Hot water heater shutoff valve: How to Turn off the Water for Plumbing Repairs

How to Turn off the Water for Plumbing Repairs

Shutting off the water supply in your home is usually necessary when you are making plumbing repairs to any of the fixtures or pipes in your home’s plumbing system. There are at least three different places you can shut off the water, and your choice of locations will depend on where the leak or the plumbing repair needs to occur. Generally, no tools are required to shut off the water.

Here are several locations where your home’s water supply can be shut off, and how to choose the right one.

Watch Now: How to Turn Off Water for Plumbing Repairs

Turning the Water off at the Fixture or Appliance

If a faucet is dripping or a toilet is running—or if a leak develops in a refrigerator ice maker, dishwasher, washing machine, or any appliance supplied by water—your first and best choice is to shut off the water right at that fixture or appliance. By shutting the water off locally in this way, other fixtures connected to your home’s plumbing system can continue to operate while you take your time to make the repair.

The fixture shut-off valves will differ in appearance and location, but generally, they will be very close to the fixture or appliance.

For sink faucets, look for the shutoff valves located below the sink, near where the water supply tubes run up to the tailpieces on the faucet. Any faucet that supplies both hot and cold water will have two valves—one for the hot water supply and one for the cold.
For toilets, there will be a single shut-off valve (a toilet uses only cold water), usually located near the floor below the water supply valve on the bottom of the toilet tank. This supply valve is usually near the bottom left side of the toilet tank.
For showers/tubs, look around the tub or shower for an access panel. It may be on the other side of the wall from the tub or shower. If it is not found behind an access panel, then it may be located under the floor in the basement or a ceiling access panel in the floor below. Shower bodies are manufactured with built in stops (valves). They are accessible when you remove the escutcheon plate. It depends on if the contractor purchased & installed a valve with stops. This is required in all high rise buildings.
For dishwashers, the water supply tube running to the dishwasher often has a fixture shutoff valve controlling it. In many cases, this is also located under the kitchen sink base cabinet, and it may be near the sink faucet shut-off valves.
For refrigerator ice makers/water dispensers, the small copper or mesh supply tube running to the refrigerator usually has a small saddle valve or fixture shutoff valve that can be shut off to close down the water supply. In some cases, the supply tube running to the refrigerator may tap into a water supply line beneath the sink, near where the sink faucet supply tubes are attached.
For clothes washers, there is most often a water supply valve controlling the hot water inlet hose and another controlling the cold water. These may be located on a utility sink if your laundry has one, or in a recessed water supply valve box set into the wall near the washing machine.

You get the idea. Any fixture or appliance should be equipped with some local shut-off valves.

But if you don’t find the shut-off valves, don’t worry. You can shut off the water by turning off the main water supply valve near the water meter.

The Spruce

Turning the Water off at the Main Shutoff Valve

If your leak is somewhere in the main branch line, or if there is no fixture shut-off valve near the fixture you need to repair or replace, find the main shut-off valve for the home. This is usually found in a utility space near where the main water line enters the house, or on an outside wall near the water meter. This valve will always be located on the same side of the house as the water meter and it is usually a rather large valve.

This valve rarely gets closed, so it may be a little stiff to operate.

After shutting off the main shut-off valve, if you open the lowest faucet in your home (such as in a basement or a foundation-level outdoor faucet) and also the highest faucet in the home, it will allow water standing in the plumbing system to drain away. This means the water supply pipes will be empty of water, which can prevent water from spilling out when you begin your work on them.

Tip

Some homes are equipped with branch valves that can be used to shut off the water supply to selected branch lines in the home. These valves will be located along the main branch pipes and are located in accessible utility areas. For example, water pipes feeding outdoor hose faucets are very often controlled by in-line valves that control only the pipes running to the outdoor faucets.

Turning the Water off at the Water Heater

When a hot water pipe is leaking, or if you need to repair or replace a water heater, there are shut-off valves located near your water heater.

A water heater has two shut-off valves. A cold water inlet valve (often identified by a blue handle) feeds cold water from the main supply into the water heater. This is the valve to shut off if you need to repair or replace the water heater.

The hot water outlet pipe also has a valve that will shut down all hot water leaving the water heater. You can shut off this valve if you have a leak in a hot water pipe somewhere in the house since this valve effectively controls all hot water in the home. Often, this valve is coded with a red handle to indicate it controls hot water. This convenient color coding is important, because often the cold water inlet pipe and the hot water outlet pipe are very close to one another, and they would be hard to tell apart otherwise. Both valves will shut off the hot water to your entire house. Most contractors do not install a valve on both the hot & cold water inlet and outlet to the heater because shutting the cold water feed to the heater is what shuts the hot water off to the system.

The Spruce

The Spruce / Letícia Almeida

Turning the Water off at the Water Meter

Finally, you may also be able to shut off the water at the water meter itself. Water meter boxes sometimes have two shutoff valves, one on the customer side and one on the city side of the meter. This should be a last resort, because in many communities there are ordinances that frown on homeowners touching any part of the plumbing system positioned on the street side of the water meter. The plumbing lines beyond the meter technically belong to the city, so you should not touch this valve unless there is no other option—such as if the main shut-off valve on the house side is non-existent or doesn’t work.

The Spruce

Importance of a Water Heater Shut-off Valve

December 10, 2021September 21, 2021 by Todd S. Jackson

Typically most homeowners ignore the importance of a water heater shut-off valve. Moreover, you need to install it correctly for safety purposes. Furthermore, it can prevent costly repairs when it comes time to replace your Hot water tank. The most common mistake homeowners make with their system installation is doing it without shutting off valves. This allows hot water to flow into the house. Even if there’s no need for it, which wastes energy and money.

What is a Hot Water Heater Shut-Off Valve?

A Hot water heater shutoff valve is a device that controls the flow of hot water into your home. You should install it in every household, and it’s especially important if you have children or pets. Since they might accidentally cause damage to the system. This can help prevent flooding within your home due to burst pipes or other accidents caused by children or pets

What are the benefits of a Hot Water Heater Shut-Off Valve?

A properly installed and maintained Hot water heater shut-off valve can prevent many costly repairs. For example, if you have an emergency situation where your home starts flooding due to burst pipes,

Hot Water Heater Shut-Off Valve

What are the Dangers of Not Having a Proper Shut-Off Valve?

Without a shut-off valve, the pressure in your system can cause hot water to gush out of any open faucet. It’s also very dangerous if someone attempts to turn on the wrong one when they are not ready to use it. Because there is no way for them to stop it from flowing into their homes.

Things to Consider When Installing a New Hot Water Heater Shut-Off Valve

It’s important to make sure that the shut-off valve location gives you easy access.
You should also check and see if there is a water pressure regulator on your system. Since, this can help reduce the risk of hot water leaks.

How Often Do I Need to Replace My Hot Water Heater Shut-Off Valve?

A Hot-water heating system has many different parts that can withstand extreme pressure. You should check your shut-off valves every year or two. Depending on how often you use them and if they seem like they need repair.

Emergency Hot Water Faucet Shut-Off Valve Basics

It’s important to make sure that the shut-off valve location gives you easy access.
Check and see if there is a water pressure regulator on your system. Since it can help reduce the risk of hot water leaks.
Similarly, check for a leaking water heater. Especially, if you have any electric water heaters.
It’s also important to check the gas supply for a gas leak. You may have to contact the gas company if this is the case.

How to Prevent Water Damage With an Automatic Shut-Off Valve?

Besides a shut-off valve, it’s also important to make sure that your water supply has the protection of an automatic unit. This will help prevent damage from leaks and flooding. When something happens such as the main water line becoming disconnected or damaged. It can also be of use in case of power outages or any other emergencies.

How Much Does It Cost to Install an Automatic Shut-Off Valve?

Depending on the size of your household and where you live. The average price for an automatic water supply line is around $300-$500. You can also get a plumber or handyman to install it within one day of service.

How to Install a Water Heater Shut-Off Valve?

The installation of a shut-off valve will depend on the heater brand that you buy. But below are some general instructions.

Shut off the water supply to your home and prep the service area.
Check for leaks in your Hot-water heating system. And make sure there is no water pressure running through it before you begin working on installing a shutoff valve.
Look for a pressure relief valve and the gas water heater if you have any.
Use Teflon tape or pipe dope at all threaded connections that are metal, plastic, or PVC.
Find the main water valve to your home and shut off the supply to the entire house.
Turn off the hot-water heater, if it has one. This is in case there will be a sudden release of pressure when you turn off the system or make adjustments.
It’s also important that you turn off or disconnect all the appliances from power wires. Before making any changes to the other fixtures.
Turn the water supply back on to flush out the lines, and check for leaks once you finish with the installation of your valve.

FAQs: Common Proper Hot Water Heater Shut-Off Valve

How do you Put a Shut-Off Valve on a Hot Water Heater?

Installing a shut-off valve is not simple. You must have an intimate knowledge of your water heater tank and the hot water pipe that leads to it. If you are not comfortable with this type of work, hire a professional.

Should You Put a Valve on the Hot Water Heater?

The answer is a resounding yes. You should install a shutoff valve on your heater. Moreover, we also recommend having a shutoff valve for the cold water supply as well.

How Long Should You Run Water After Shut Off?

After all faucets are not closed, let the cold water go for at least Thirty minutes. In this time, also flush each toilet in your home two or three times. Passing the cold water should get rid of any old (stagnant) water which may contain higher concentrations of metals including lead, if it exists in your service line or plumbing.

What are the Signs That a Valve is On or Off?

If we see the handle on top is parallel to the valve, it is open. Also, if the handle is perpendicular to the top, the valve is closed. Typically, ball valves are found in irrigation systems and in sites that need to control the flow of water to go one unit to another.

Is It Safe to Turn Off the Hot Water Valve?

Yes, it’s good to turn off the shut-off valves. If you’re going away for an extended period of time and won’t be using your water heater. It’s good to shut off the valve. This will prevent damage to your plumbing or appliances when you are away.

Conclusion

The best way to avoid the need for a new water heater is by having a shut-off valve that you install correctly.

Not only will you have peace of mind knowing that it’s safe, but you can also save money on costly repairs when the time comes to replace your Hot water tank. If you are looking for installation services near you, contact us today for more information.

Facts About The Best Shower Water Filter

Prevent Water Damage with an Automatic Shut Off Valve

To protect against unexpected catastrophes, installing an automatic shut off valve is the easiest and most affordable approach.

Need to Hire a Plumber?

Get a free estimate online from top local home service pros in your area.

Note: This post may contain affiliate links. This means that at no cost to you, we may receive a small commission for made purchases.

The Topeka Capital Journal points out that having an automatic shut off valve is imperative for any type of water-using appliance, namely water heaters but also dishwashers, washing machines, toilets, and even some refrigerators.

Table of Contents

Purpose of an Automatic Shut Off Valve

With an automatic shut off valve, the leak is detected early and the flow is stopped. Even better, some types of automatic shut off valves include a disconnect for the power as well, which could mean the difference between repairing a leak and replacing your water heater.

The idea is to have a device in place that can measure small amounts of water and turn off the flow before major damage can result.

How Does it Work?

Most automatic shut off valves work the same way, using a sensor that is able to detect the presence of a liquid. When the sensor receives a positive feedback for water or other liquids, it sends a signal to an electronic switch and the water supply is shut off.

High end sensors will also turn off the power to your water heater, eliminating the problem of burnt heating elements in an empty water tank. There are even digital shut off valves that will send a signal to your cell phone and allow you take control of the situation remotely, shutting down the water, turning off the power, and finally setting up an appointment with a plumber or other professional.

What Does it Cost?

The good news is that an automatic shut off for your water heater is relatively inexpensive.

Economy models start at around $60, and high end digital models will run you around $200. The best bet is to look for something ranging between $100 and $150, and offering the features that are most appealing to your personal needs.

And before you balk at the idea of spending more than $100 on a protective device, take into consideration that tearing out carpet alone could cost you more, and that’s before any actual repairs are made to a water damaged floor.

If we were to recommend one unit, it would have to be the FloodStop FS3/4NPT. It has a 3/4″ inlet and outlet, a good sensor which is simply placed on the floor or pan below the water heater, and it just flat out works.

It’s great insurance to have and is one of the easiest units to install (it helps when the instructions are clear and easy to follow). One thing during installation, use a thread sealant as opposed to teflon tape when making your connections. If your water heater is not on a ground floor or in the attic, the FloodStop is a must.

Water Heater Hub Recommends:

FloodStop FS3/4NPT Auto Shut-off Valve

Installing an Automatic Shut Off Valve

Installing a shut off valve is an easy process, usually requiring a pipe wrench, a screwdriver, and not much else.

Most automatic shut off valves are composed of three primary parts: The valve, the controller, and the moisture detector. Place the detector at the lowest point, generally in the drain pan of the water heater, mount the controller on a wall or other stable surface, and install the valve inline between the tank and the water inlet pipe.

For additional protection, some shut off valves support multiple detectors so that you can shut down the water if leaks are detected in other locations as well.

Why Automatic Shut Off Valves Save Money

A little water on the floor is least of your worries when a leak happens. Carpet and rugs get ruined quickly, drywall absorbs water and turns into mush, wooden studs begin to decay, and that’s before you take into account the dangers of a water-logged floor– or ceiling space.

Allstate Insurance reports that while home insurance may cover the cleanup after a leak happens, it will not usually pay to repair the source of the leak at all, and if the insurance company determines that the leak was due to homeowner negligence there may not be any coverage at all.

When you consider the mounting costs of repair and cleanup, investing in an automatic shut off valve is a minor expense.

Maintenance Matters

Very few water heater leaks become a major problem overnight, and most costly leaks can be prevented with a little maintenance. Check the lines leading to and away from your water heater quarterly or even more often, and replace or repair problems as soon as they are detected.

A $20 repair today could literally save you thousands tomorrow, and putting off repairs until the last minute could easily add several hundred dollars to the repair bill. Coupled with an automatic shut off valve, regular maintenance can keep your water heater operating flawlessly for many years.

Need to Hire a Plumber?

Get a free estimate online from top local home service pros in your area.

Should I Turn off My Water Heater if the House Water is Shut off?

Are you wondering if you should turn off your water heater if the house water is shut off? You’ve come to the right place. Below, I’ll share a few things you should know about your water heater.

Yes, you should turn off your water heater if the house water is shut off for an extended time. Your water heater has a tank that contains water. As long as you don’t use the water, it stays in the water heater (this depends on the type of water heater). If, for any reason, the water levels fall in the tank, then it’s best to turn off the water heater.

Like anything in life, the discussion on when to turn off your water heater has nuances. In the sections below, we’ll unpack several scenarios and discuss how to handle them.

These days, there are many types of water heaters and plumbing systems. Want the best advice? Find your water heater’s manufacturer and give them a call. Ask them what your water heater can and cannot handle.

Let’s dive into more specifics.

Why Should You Turn Off Your Water Heater When the Main Water is Off?

If you’ve ever set a full plastic water bottle in a fire, you’ll know that the plastic doesn’t melt. This is surprising to most people and leads many to wonder: what’s going on? Essentially, the water dissipates the heat and prevents the plastic water bottle from melting.

If a plastic water bottle were placed in a fire without water inside, the plastic would begin to melt (note, we’re not suggesting you place plastic in a fire! This can create dangerous fumes).

The same thing happens with traditional water heaters. The interior of the water heater is often coated with components that can burn up if there’s no water in the tank. In fact, some professionals site water loss in a water tank as one of the primary reasons they blow up.

Hopefully, you’re starting to understand. However, in the next sections, we’ll explain more about the anatomy of a water heater.

How Do Water Heaters Work?

Water heaters come in all sorts of configurations. This section will talk about the general configuration of traditional water heaters.

For our purposes, we’ll talk about four components: the heater, the tank, the incoming water supply, and the outgoing water line.

The heater itself may use gas or electricity to heat the water. The tank is what holds the water. The tank works with the heating component to have gallons of hot water ready when you need it. When you turn on the hot water, the hot water leaves through the outgoing water line, and cold water refills the tank, and the heater begins heating again.

Often, the inner tank will have a corrosion-resistant coating. If the tank gets hot but there’s no water, the coating could become damaged.

We’ve just described a water heater that uses a tank; however, some water heaters are known as tankless or instant.

Tankless Water Heaters

Tankless water heaters have two advantages. First, they don’t have a big supply of water that takes a lot of energy to heat and risks leaking. Second, instant water heaters provide a near-endless supply of hot water, unlike tank systems which can become easily overloaded with too much use.

Should you turn off a tankless water heater if the main water is off? Well, it’s less important than turning off the regular water heater. It’s up to you and the manufacturer. Some tankless water heaters may benefit from being turned off, but for most, it isn’t an issue.

In general, if you’re leaving the house dormant for a while, then turning off all appliances is a good practice.

Should You Turn off Your Water Heater for Repairs?

If you’ve turned off the main water line to make a repair, you’ll need to consider two main things.

First, is the repair related to the water heater? If you’re making a repair directly to the water heater, then yes, it’s probably prudent to turn off the water heater as well – especially if the repair involves anything with the electrical system or the gas supply.

However, if you’re making a plumbing repair that is completely non-related to the water heater, then there’s no reason to mess with the whole system. With that said, there is one exception to this.

If, for some reason, you could be draining the water heater during the repair, and the repair could extend for a day or so, then turn off the water heater. You don’t want to risk draining the water from the tank with no water to refill the system.

Should You Turn off Your Water Heater While on Vacation?

Most people know that it’s wise to turn off the water to the house if you’re leaving for an extended vacation. Turning off your main water keeps your home safe from extensive water damage. Why? Just think, if there was even a tiny leak, if the house water is on, that leak could flood the entire house.

So, people often wonder if turning off their water heater is also an important step of home safety during vacation or extended absences. Let’s start with this: turning off the water heater is not as important as turning off the house water.

However, if you’ll be away for an extended period, then it’s probably prudent to turn off the water heater also. Why? Because, though the cost may be minimal, you’re still spending money on keeping water warm when nobody will be using it.

With that said, there is another option: vacation mode.

Most water heaters allow you to turn the unit to “Low” or “VAC” this turns the heater down considerably, saving you energy while also preventing a lengthy start-up process.

Why Some People Avoid Turning Off Their Water Heaters Even With the House Water Off

Some people are averse to the idea of ever turning off their water heater. The reason? Hot water heaters, particularly traditional water heaters with a tank, require some jump ropes to get started again.

For one, you often need to start a pilot light. The pilot light aids in heating the unit. Sometimes, the pilot light is easy to light. Other times, lighting a water heater pilot light can be a real pain! This can depend on the unit’s location – if the water heater is in a dark, dank basement, it will be more difficult to get it started.

Second, you’ll have to wait a while for hot water. This will depend on the unit’s efficiency, but nobody likes cold showers – the whole point in having a water heater is to have hot water.

If you need to turn off your water heater, we’ll talk about how to do this in the next section.

How Do You Turn off Your Water Heater?

There are several times you should always turn off a water heater, such as if the water heater is leaking, or if you’ll be away for several weeks. So, in this section, we’ll go over the steps required to turn off a water heater. It’s always best to follow the manufacturer’s guidelines, as every water heater is a little different in its setup.

Here are the steps to turn off a water heater:

Cut the gas or electricity
Turn off the incoming water valve
Drain the water

Time to look at these steps closer.

Note: have a look at your hot water heater before the emergency. This will ensure you’re prepared.

Cut the Gas or Electricity to the Hot water Heater

You can usually turn off the gas with a switch nearby the water heater. There is usually a simple valve that needs to be turned off. However, depending on the situation, you may also want to cut the gas supply to your house to prevent carbon monoxide gases in your house.

To cut the electricity, you should have the switch marked at your main breaker.

Turn off the Incoming Water Supply

The incoming water supply fills the water heater with a steady supply of cool water. If you notice the water heater leaking, then turning off the water supply is one of the first steps.

Usually, the incoming water supply has a valve near the water heater that allows you to cut the supply to your water heater completely.

Drain the Water to Your Water Heater

After you’ve turned off the water supply to your water heater, you may need to drain the water – especially if you need to replace a damaged water heater.

Near the bottom of the water heater, you’ll find a spout to drain the water. This spout can be routed into a floor drain. Here’s a video that explains how to turn off the water heater.

Now for our final word.

Key Takeaway on Turning Off the Water Heater When the House Water is Shut Off

Always turn off your water heater if you suspect it is leaking or if it is near failure. Water heaters that are going bad will make strange noises, or you may notice abnormalities in your hot water.

You don’t always need to turn off the water heater if your house water is off; however, you should turn off the water heater if you’ll be gone for extended periods or if you’re making repairs to the water heater itself.

How to Turn Off Water Heater? (Step-by-Step Tutorial)

Gas or water leak are some of the things that can scare you the most. But that doesn’t always have to be the case if you know how to turn off water heater.

When your digital alarm begins to sound, it’s not the time to panic or do something silly. Even before you a call in a plumber, you need to turn off everything to stop the gas or water leak.

How to Turn Off Water Heater

Overheating, strange noises or other bad signs are indications of danger, and you need to do something fast. So if you want to know how to turn off water heater, follow these simple steps

Step 1. Disconnect from the Power Source

The first step is to go to the power source and disconnect your water heater. If there is an electric unit, make sure you turn off the circuit breaker. For the gas unit, go to the dial close to the thermostat and move it in the other direction.

Step 2. Turn the Water Off

You don’t do this step until you are sure the electricity connected to the water heater is turned off completely. Whether it’s an electric tankless water heater or a propane tankless water heater, they come with different kinds of handles. Some handles are circular, and all you need do to turn it off is to rotate it to the right.

With this action, you open the way for cold water to flow in, and your sink and tubs will not receive hot water. If you don’t find where water is connected to the heater, turn off the water supply for the entire house. Locate the valve close to the meter, open the box, and turn the valve in the other direction.

Step 3. Carefully Drain the Water in the Tank

Check the bottom part of the tank to see where you can connect a hose to drain the water. Insert the end of the hose to a floor drain or a tub until all the hot water flows out. Read the product manual carefully to get any specific information about safety when draining water.

Turning off both power and water supply is the first thing on how to turn off hot water heater. Once this is done, you minimize any potential risk that leakages or broken propane gas water heater can cause. Be very careful when draining the tank to avoid splashes of hot water.

Step 4. Label Your Circuit Breaker

The content of your circuit breaker may be complex and unclear. This will require labeling to make sure you know the original position of each component. When there is an emergency, and you have to shut down power completely, those labels will be helpful.

If you have a circuit breaker already labeled, test each component carefully to determine its function. You don’t want to think it is turned off power when you did not.

Step 5. Practice Shutting Off Water Heater

Most people panic and get confused when their heater leaks or the alarm sets off. The only way to overcome this confusion is to know how to turn off water heater ahead of time. Maintaining the habit of draining your water heater every six months can make you understand the process.

Practice how to turn on or turn off hot water heater supply flowing into the whole house. Learn to open the valve slowly as turning it too quickly can make things worse. If you’re not sure the right way to do it, ask your local plumber for help.

This knowledge also applies when turning off the water flowing to all the appliances in your home. A little regular practice will remove the panic you experience during emergencies. You won’t want to worsen the problem since you don’t know how to turn off water heater when it’s heating.

How to Turn Off a Gas Water Heater

If your home uses a tankless gas water heater, you must understand how to turn off a Gas water heater. Follow these simple ways to do it right.

Step 1: Turn Off the Water Heater Valve

Check the front of the tank, and you will notice a red or black button. Sometimes these buttons are hidden behind insulating materials, and you have to pull it off to reveal the button. Move or turn the switch from the “on” position to the “off” position.

Turning off the heater will stop the pilot from working and the burner from heating. Pull off the heat shield and check inside for signs of heat or flames. If you’re doing maintenance, turn on the pilot, and the flame stays lit, but the burner won’t work.

Step 2: Turn Off the Line that Supplies Gas

If you want to go out and hear the heater making a hissing sound, turn off the gas line valve. Just go and shut off the valve located on the gas line close to the heater. Turn the lever until it is perpendicular to the gas line.

If you can find any valve, trace the gas line until you find a handle that serves as the switch. Gas line valves are often easy to locate, and you don’t need to search for too long. But if you can’t find it, contact a local plumber.

Step 3: Shut Down the Water Heater

If you’re leaving home during winter, ensure you drain the water in the tank so that it doesn’t get frozen. Turn off the heater and wait for 12 hours to allow the water cool down and to avoid getting scalded. To drain your tank, make sure you:

Put a bucket under the pressure relief valve so that water goes directly into the bucket. Open the relief valve to allow steam to escape and then gently release the lever. Insert a hose to the drain valve located right at the bottom.

Pull the hose to the particular spot you want to drain the water. Normally the draining area should be on a higher elevation than the position of the water tank. If you have a garden, it may be a good time to drain the water into your garden.

Turn off the cold water valve and turn on the hot water faucets to let the water out. Keep the drain valve open until all the water runs out and then close it.

Next, turn off all the open faucets in the house. If the water doesn’t drain, it could be that mineral deposits have blocked the drainage channels. Shut off the valve and then pull off the hose to clear out all deposits. Reattach the hose and turn on the valve once again.

How to Turn Off an Electric Water Heater

The following five steps are useful in shutting down your electric water heater. Follow the guidelines and learn how to turn off water heater in your home.

Step 1: Turn Off the Breaker

The first thing about how to turn off water heater electric is to locate the two-pole breaker. It is about 30 or 50 amps and usually marked.

You should turn off the power at the breaker panel even if you have shut down the electric water heater. If the breaker has lock-out lugs, put them on the breaker.

If you feel you might get confused, label the breaker with paper tape to warn against mistakes. It is also a good idea to tell everyone in the house what you are up to at that moment. They should avoid going near the service panel or the water heater until you are through.

As a way of precaution, use a non-contact voltage tester to make sure there is no heat inside the cover. It is risky to expose yourself to shock or heat when replacing the water heater element.

Step 2: Put a Tag on the Breaker

Safety standards demand that you put a tag on what you are working on to avoid getting anybody hurt. When you are dealing with electricity, it is wise to lock the area off to keep off potential victims. Tag the place and the equipment to warn anyone who may mistakenly walk close to the spot.

In the home, shutting down the breaker isn’t enough as everyone is exposed to similar danger. It will serve well if you put some identification and restriction in place to warn family members of potential dangers. While you may not copy construction site protocols, you have to make sure everyone is safe.

Don’t take the idea of safety as a joke since single electrocution can take a life. Take practical steps to make sure you cut off power completely from the heater and the breaker.

Another way to maintain safety is to put paper tape on the breaker and mark it “Do Not Touch.” Anyone who reads the warning will stay away from the danger.

Step 3: Cool Off the Water

You will need to cool off the water in the tank before you make any repairs. It is good to turn off the heater to stop the water from further heat. Allow the water to naturally and gradually cool off on its own.

Do not attempt to add cold water to help in cooling down the water. Just turn on a faucet in the house and allow it to run fully. If the water feels lukewarm after some time, then it is safe to start your repairs.

Once the repair is done, turn on the heater and allow the water to heat up normally. Give an hour before using hot water for shower, laundry, or dishwashing anywhere in the home.

Step 4: Turning Water Off

Water tanks should always have a shut-off valve on the outlet outside the home. The location of the tank prevents it from building excessive internal pressure. Turn off your cold water supply when working on the hot water tank.

If your tank has two valves, find the one which brings in cold water and turn it off. It is usually the valve on your right when you stand facing the tank. Normally, two valves shouldn’t be found on a supply line, so be careful while doing it.

If water is running through the pipes, feel them with your hands. The cold line is for cold water while the hot pipe is for hot water.

You can decide to turn on a water faucet in the house. The one that vibrates as water rushes out is the hot water supply line. Put a label on the cold line to remind yourself which valve should remain locked.

Step 5: Drain the Hot Water Tank

As you begin to understand how to turn off hot water heater supply, you’ll discover a few facts. You can carry out some activities without draining the water tank. If you are adjusting or testing the thermostat or checking the power supply unit, you may leave the tank full.

Activities like removing or changing the element or flushing sediments require you drain the water first. The buildup of deposits can affect the heating of water in the lower part of the tank. Turn off the heater and allow the water to cool down before draining and repairs.

Wrap Up

As you can see, turning off water heaters of any kind has never been as easy. The only requirement is to learn how to turn off water heater. Yes, it is as simple as that.

If you have a similar or different experience, share them with us in the comment section. We’ll be glad to learn from your personal experience.

Always keep in mind the summary of the steps mentioned in this article:

Turn off the water heater
Shut down power from the circuit breaker
Turn off the water supply
Make your repairs and
Switch water back on

Should I Turn Off the Water Heater if the Water Is Off?

When your water line is shut off, cold water stops flowing into your home entirely, and if your water heater has a tank, the tank will stop refilling with cold water. If your water is shut off for long periods of time and you use your hot water heavily, this can create the risk of serious damage.

You should turn off your water heater if the water is off only if your water is turned off for an extended period of time, like a vacation, and you have a tank-type or hybrid water heater. For short term shutoffs, you can leave your water heater on until the cold water starts flowing in again.

This article will discuss the kinds of water heaters, how they connect to a water line, and what to do if you need to shut your water off or experience a shutoff for any reason.

» NAVIGATION «

How Water Heaters Work

The water that enters your home through a water line and the connected pipes is usually cold or cool, even in the summertime. For you to have warm water in the home, the water needs to be heated after it’s delivered through the pipes.

Water heaters are usually found in a home’s basement and require a gas or electric heating unit. There are four basic types, each of which performs this same function in different ways. The four basic types are:

Tank-Type Heaters

Tank-type heaters are the most popular kind of water heater. Basically, it consists of an insulated tank filled with water, above or beside a gas or electric heating mechanism. The cold water enters the bottom of the tank, then rises as a gas flame or electric element heats up the water. A pressure-relief valve keeps the heater from becoming too pressurized.

When an appliance or faucet needs warm water, the water tank pumps hot water out through the top of the tank, then replaces it with new, cold water at the bottom. Though this process repeats continually, these heaters can sometimes struggle to keep up with high demands for hot water.

Tank-type heaters also use energy continuously to keep the water in the tank warm even when it is not needed, which makes them less efficient than some alternatives.

Tankless Water Heaters

Tankless water heaters are much smaller than the tank-type heaters because they do not store water. Instead, the heater waits for a hot-water tap or appliance to demand warm water, then initiates an electric element or gas burner and draws cold water directly over the heating mechanism and to where it is needed.

Tankless water heaters last much longer than tank-type heaters and produce an unlimited supply of hot water, but are much more expensive to purchase, install, and repair.

Hybrid Water Heaters

Hybrid water heaters use less energy than a tank-type heater, but more than a tankless water heater. Essentially, the hybrid works by storing water in a tank connected to an air compressor, which captures heat from the surrounding air and transfers it to the cold water, instead of using a gas flame or electrical elements.

Point-of-Use Heaters

Point-of-use heaters are small and compact and are usually used in combination with the main water heater. Generally, point-of-use heaters are installed at fixtures far away from the main heater to avoid running the water and waiting for the water to become warm. These electrically powered units heat the water instantaneously, eliminating wait time.

Point-of-use heaters typically last a long time and can be installed very quickly and easily, but cannot replace a main water heater in the home.

How the Home Water Line Works

If your home is connected to a city water line, then your water main can be identified by locating a ½” to 1½ ” pipeline near your water meter. You may or may not also see an emergency shutoff valve, which would cut off all water headed into your plumbing system. If your home is connected to a water well, your system may look slightly different, but the function is the same.

The water that enters your home through the main water line is pressurized, which allows it to travel against gravity through your pipes. This means that water can flow very quickly, whether from a faucet, hose or through a broken pipe in the case of an accident. If you do have a broken pipe, it’s important to use your emergency shutoff valve to avoid heavy flooding.

Water leaves the house through separate drainage systems, which use gravity to pull water down, creating a flow that carries wastewater through pipes and to a sewage treatment facility or septic tank.

The Water Line and the Water Heater

Water that enters your house is cold and travels through cold water pipes. One of these pipes connects to the water heater. Your water heater also connects to a hot water line, where water flows out to different appliances and taps. Water flows into and out of the heater as needed.

What Happens to the Water Heater When Your Water Is Turned Off?

When your water is turned off, cold water stops flowing into your plumbing system from the outside, meaning that a tank-type or hybrid heater stops being able to refill with more water. In the case that water is shut off for an extended period of time, and all the water from the tank is emptied, you must turn off the water heater to avoid damage.

However, if your water heater is full or nearly full, you shouldn’t need to turn it off in a short-term water shutoff.

Tankless and point-of-use water heaters do not need to be shut off in any case to a water shutoff, as they do not run heating elements continuously or hold water in a storage tank.

When to Turn Off Your Water Heater

Turning off your water heater may be necessary in the case of a plumbing emergency, like in the case that your cold water line loses pressure and fails to fill the water tank, or in the case that your water tank empties for any other reason.

In other cases, turning off your water heater may be desirable, but not necessary, like in the case of a leak. Leaks can happen for a number of different reasons:

Loose valves
Damaged tank
High pressure
High temperature
Improper drainage
Old age

If you’re simply looking to save money by avoiding running the water heater when it’s not being used, it’s best to turn the temperature down instead of completely turning the unit off. Water heaters can be difficult to turn back on, and you may find yourself without hot water for longer than you’d like.

If you decide to turn off your water heater, make sure that you work carefully and understand your water heater’s components before making any adjustments. A water heater’s components are:

The shutoff valve stops the flow of cold water into the water heater and is typically located outside and above the unit.
The drain valve is usually located near the bottom of the tan and empties water and sediment from the storage tank.
The pressure relief valve keeps the pressure inside the tank within safe limits.
The heating mechanism may be gas or electric and is the most important part of the tank to shut off if you are concerned about an empty tank following a water shutoff.

To turn off your water heater, following the following instructions in this video:

Conclusion

You do not need to shut off your water heater if the water is off in most cases. However, in the unlikely case that you’ve had your water shut off for an extended period of time and used all the water in your water heater tank, then it is necessary to turn off the water heater. When in doubt, call a professional plumber.

Water heater check valve: how to choose and use

Electric water heater creates comfort in the house by providing residents with hot water. But those who often come across him know that the boiler can pose a certain danger associated with a rupture of the container if it is installed incorrectly. A properly assembled circuit, including the mandatory installation of a safety assembly, will help to avoid this.

Contents

1 Purpose of the safety valve
2 How it works
3 Existing types of valves
4 Installation rules
5 Possible breakdowns and how to eliminate them

Purpose of the safety valve

To understand why a safety valve is needed on a water heater, you need to remember the lessons of physics. Heated to a temperature of 90 ^about C, water expands by about 3%. It is easy to calculate that inside a 50-liter boiler, during operation, the volume of hot water will increase by 1. 5 liters. If it is not drained, the container will simply break. To prevent this from happening, a valve is installed that is designed for a certain pressure. When a critical point is reached, the mechanism is triggered, bleeding excess fluid into the sewer.

That’s what this mechanism is for. Its device protects the boiler from excess pressure that occurs when water is heated.

Principle of operation

If we take a closer look at the design of the valve and the principle of its operation, then the whole mechanism can be called a valve system. This is because there are two of them in one building. The work of the first is clear, excess pressure is bled from the boiler through it. The mechanism is connected to the side opening of the case. What is the second check valve for? The arrangement of the mechanism inside the housing is such that the check valve is located at the bottom opposite the inlet. It prevents cold water from flowing out of the boiler in the absence of pressure inside the water supply.

The principle of operation of the mechanism is as follows:

As long as the pressure inside the water heater is less than the water pressure, water presses the check valve plate, constantly flowing into the tank. After the pressure is equalized, the spring presses the plate against the seat of the body, thereby preventing the flow of liquid into the tank.
Further operation of the mechanism consists of waiting. The liquid inside the boiler gradually expands from heating, and until the pressure reaches a critical point, the valve system is closed.
After exceeding the allowable limit, the hot water pressure compresses the safety valve spring. The plate comes out of the housing socket, opening a hole where excess fluid will drain. Having reached normal limits, the spring presses the plate back to the seat, setting the mechanism to its original state.

Having considered the device and the principle of operation of the mechanism, we can draw conclusions why water often drips at the outlet. This will always happen when the temperature of the liquid rises and the water pressure drops, which indicates the normal operation of the device.

Next, the question arises of what to do with the liquid flowing from the side hole. A PVC pipe is connected to the outlet to drain the water. It must be reinforced and fixed with a clamp to the nozzle. These performance requirements are mandatory, as the operating pressure, which is in the range of 6-10 bar, will tear and burst the tube. Sometimes they ask the question, why make a drain from a transparent tube? The answer is simple, for convenience. Through transparent walls it is convenient to control work. That is, it will be seen whether water is flowing or dripping, which can often indicate a malfunction of the mechanism.

Existing valve types

The conventional water heater check valve is available in different designs. Although the appearance and principle of operation are almost the same, there are still some nuances.

Each modification of the design helps to comfortably use the boiler, and sometimes, on the contrary, interferes:

safety valve with a lever is convenient for a control check of the mechanism for operability, which must be carried out monthly. Raising the flag, the lever forcibly opens the drain hole. It also helps to drain the water heater completely in case of an emergency. Some models have flags fixed with a screw. It protects the mechanism from accidental opening;
When installing or replacing a valve, pay attention to the presence of the direction arrow and the marking of the permissible working pressure. In the absence of such, the direction of movement of the liquid can be recognized by the location of the plate in the socket, looking inside the housing. But how to find out the working pressure, because it is only tested by checks? No way, and the sellers will not help in this either. Therefore, it is better not to install such models;
, the fittings themselves, through which water is discharged, may also have their own differences. It is convenient to put on a tube on a long herringbone-shaped ledge and fix it with a clamp. The short fitting also has a thickening on the edge to hold the hose, but there is not enough room for a clamp. The tube will have to be crimped with wire;

if the safety valve is not flagged, it is for forced draining only. It is impossible to check its performance with a control drain. It is good if the case has a threaded cap for maintenance. By unscrewing it, you can clean the clogged mechanism. There are cheap maintenance-free models. Such valves should generally be abandoned because of the danger of their use.

The above types of valves are usually used on boilers with a capacity of up to 60 liters. In a large water heater, the valve goes together with a pressure gauge and a stopcock. The fitting is threaded, which makes the fastening of the drain hose reliable.

Installation instructions

In order for the boiler to work safely, the check valve must be correctly installed in the system. Usually it comes with a water heater. If not available, the safety device must be selected separately, and the allowable pressure of the valve must correspond to the working pressure of the boiler. All parameters can be found in the product manual.

Installation of the safety unit on the boiler can be carried out with or without adapters, but subject to certain rules:

the safety valve must be installed on the branch of the water supply that supplies cold water to the inside of the tank;
place the valve between the stopcock and the tank. If the thread is suitable, it is simply screwed onto the threaded pipe of the tank, and a tap is screwed directly onto the valve thread;
installation must be carried out strictly in the direction indicated by the arrow. All threaded connections are sealed with flax or FUM tape;
it is necessary to tighten the thread tightly to avoid leaks, but it is also undesirable to apply great efforts. The bronze case may burst, which will lead to additional costs for the purchase of a new product.

The design of some valve models may differ in the presence of a regulator for actuating the mechanism by pressure. The principle of its adjustment is to loosen or tighten the clamping spring. You need to know that initially the mechanism has already been adjusted by the manufacturer, and it is impossible to make your own changes there without experience.

After installation, draw water into the water heater to check all connections. If there is a leak, you can try to tighten the thread. Otherwise, you will have to drain the water to repack the compounds. You can check the operation of the valve by turning the flag. If, during this action, water flows from the fitting, and after the flag returns to its original position, the flow stops, then the mechanism is working properly.

Possible breakdowns and their elimination

Breakdown of the safety unit is expressed by the constant flow of water or its complete absence. If the liquid flows or drips only when heated, which is convenient to observe through a transparent tube, then everything is working properly. That’s what this node is for.

Let’s look at the possible causes of leakage:

it happens that water drips from a cold boiler. Here you can observe the drop frequency. If it becomes more frequent and then subsides, it is possible that the water pressure exceeds the permissible limits. The non-return valve is constantly open and excess water pressure, passing through the water heater, is released. After the normalization of the water pressure, the flow will stop. With frequent repetition of such situations, it is advisable to install a reducer at the inlet of the water supply to the house;
Sometimes water drips due to debris under the plate seat. You can correct the situation by periodically bleeding off the liquid using the emergency lever. The flowing water will wash away the dirt, the plate will sit tightly in the saddle, and the dripping will stop before the boiler heats up. When bleeding did not give positive results, a spring is pulled out from the collapsible model to clean it from dirt. If this does not help or the body of the safety assembly is not separable, it will only have to be replaced with a new one;
normally leaking water brings additional costs, but there is no danger of the water heater bursting. It is bad if the liquid does not flow at all and does not drip. This may be due to scale in the mechanism itself or inside the fitting. Only mechanical cleaning will help here or it is better to change the assembly;
Some valve models may leak due to incorrect installation. They need to be wound only four turns, otherwise the adjustment is pressed through. Improved models with a limiter are now being sold, which can be screwed all the way. It is best for an inexperienced person to give preference to just such a design;
there are situations that a person sins on the valve, and the boiler itself is to blame. This is due to the rapid increase in pressure at the outlet of the water heater when it is heated. The first reason occurs when the thermostat breaks down, which can be replaced with a new one. The second reason is the worst. Cheap Chinese products inside the tank have little room for liquid expansion. This can be corrected by installing a hydraulic accumulator or purchasing a high-quality boiler.

The operability of the safety unit will protect the residents of the house from burns that can be obtained during the rupture of the boiler with boiling water. The main thing to remember is that a simple check valve cannot be installed instead of such a node. This will only make the situation worse.

what is needed, which one to choose, installation and replacement

March 24, 2022

Reading time:
11 minutes

Content

Structure and principle of operation

Rules for installing a safety valve on a boiler

What is the purpose of a safety valve on a water heater

How to open the valve on an electric water heater

How the non-return valve on the boiler works and works

Replacing the safety valve on the water heater

Is it worth it to install the safety valve on the water heater

Where and how to install the safety valve for the water heater

How the valve works in different situations

How the valve works and its functions

What are the complaints about the operation of the water heater valve

How the safety valve for the water heater works

Description of the non-return valve for a domestic water heater

Steps before installing a safety valve on a water heater

Do I need a non-return valve for sewage and how to install it

Why a non-return valve alone is not enough

Tips for a successful installation of a non-return valve on a boiler

What to do if it leaks from the valve

Safety fittings

Briefly about the main thing

A water heater in the house is a very important thing that provides comfort and quality of life. However, there are times when the boiler fails and a short circuit or explosion can occur. To eliminate these situations, a safety valve is installed on the apparatus system. Its main task is to prevent such situations and protect against emergencies.

Type of fuse

Design device and principle of operation

The safety valve is a device that prevents serious accidents, but is small and simple. The valve mechanism for the water heater consists of two springs in a metal case, which are located at an angle of 90 degrees.

The larger tube has two threads at the ends. It is in it that the check valve is located. Its task is to direct the water only in one direction, thanks to the “plate”.

Due to the action of the pressure that is directed into the boiler, the damper opens and compresses the spring. After the pressure equalizes, the valve will automatically close.

A second cylinder with a smaller diameter performs the task of opening the damper when the pressure in the first valve is increased above normal. It is this function that protects against explosions.

Rules for installing a safety valve on a boiler

The valve for the water heater is placed on the cold water supply line to the machine.

No other parts of the shut-off valve need to be installed additionally.

Where to install the valve

To install the valve on the water heater, follow the instructions:

The fuse is placed on the pipe with cold water, between the stopcock and the inlet to the machine.
To avoid mistakes, there is an arrow on the body of the part that indicates the direction of the water.
Treat the joint with sealant.

What is the safety valve on the water heater for?

Structural element used to secure the boiler system in the event of severe pressure surges. Since water expands when heated, it becomes more by almost 3%. To prevent the device from bursting, the safety valve discharges excess liquid from the tank.

How to choose a safety valve for a water heater

Most models already come with this tool, so if it breaks, you can easily pick it up according to the following criteria:

boiler model;
maximum pressure parameters;
thread diameter.

Element Mounting Recommendations

The valve installation procedure is based on several rules. It is worth following these recommendations:

Types of safety valve for the boiler

The length of the flexible connection from the valve to the boiler is NOT more than two meters.
It is best to connect the fuse directly to the machine’s fitting.
It is worth making a technical hatch to make it easier to service the fittings

How to open the valve on an electric water heater

It will take a lot of effort to open the valve, because the pressure will not allow the spring to be compressed.

The lever is vertical, which means the damper is closed. To open it, you need to move the handle up. After that, the water should begin to drain from the water heater.

How to replace a broken fuse

Replacing the safety valve on a home boiler is carried out in a certain sequence. What we do:

Empty the boiler tank and disconnect from the mains.
Shut off the water supply to the machine.
Open cold water on one tap and hot water on the other.
Turn on the water flow from the boiler.
Remove the hose from the nozzle.
Remove the old/broken fuse and install a new one.
Close the mixers and turn on the boiler.

How the non-return valve on the boiler is arranged and works

When referring to a water heater, it is better to use the term “safety valve”. They have similarities and one very important difference.

Valve with lever for manual opening

The main difference between a non-return valve and a safety valve for a boiler is that it has an additional perpendicular cylinder. It is in it that a powerful spring is located, which is the very fuse against failure. In addition, there is a so-called plate in the cylinder, behind which there is a branch pipe into which excess water is drained.

Most water heater valves have a lever to open it manually.

Replacing the safety valve on the water heater

To dismantle the water trap, turn off the power to the boiler and drain the liquid from the tank. After that, shut off the water supply and disconnect the hose from the water heater. It is necessary to clean the thread of the pipe, and then wrap it with a clean fum tape and re-tighten the valve. Now you can open the taps and check for leaks.

Is it worth it to install a safety valve on a water heater

Many people think for a long time about whether it is worth installing a damper on the boiler. And experts say that it is necessary to install it. And the explanation for this can be found in the video.

Important! In the absence of a safety valve on the water heater, manufacturers refuse to provide their warranty services.

Where and how to install a safety valve for a water heater

Installing the safety valve on the water heater is very easy.

We install a fuse on the pipe with cold water supply, in the interval from the stopcock and the inlet to the device.
The distance between the water connection and the valve must be between 180 and 220 cm.
To avoid mistakes, there is an arrow on the body of the system that indicates the direction of the water into the tank.
Treat the joint with sealant.

How the valve works in different situations

The operation of the plug is quite simple and understandable to everyone. Therefore, consider how the boiler will work in other situations.

With a sharp increase in pressure, the spring mechanism opens a hole for the fluid to exit. If the valve is faulty, then the fluid will look for another way out. This can cause the cold water faucet to drain.

How the valve works

If the pressure drops and there is no check valve, then all the water will simply drain from the tank. And here it is important that the water heater has protection against “dry” heating. Otherwise, everything can end with the combustion of heating elements and damaged enamel of the container.

And in the event of problems with the thermostatic controller, water heating continues indefinitely. Consequently, the pressure in the tank also increases, and as soon as the temperature of the liquid reaches 100 degrees, the apparatus may explode.

How the valve works and its functions

The valve mechanism consists of two springs in one metal housing. The cylinders are arranged at an angle of 90 degrees and perform different functions.

This spring keeps the “door” closed and prevents liquid from returning to the pipeline. The second spring is more powerful and most of it is in the neutral position. It opens the drain hole only when the pressure rises.

The main functions of the valve are:

protect container from bursting;
prevent hot water from entering the water supply;
bring the pressure to neutral;
Drain the tank when the pressure builds up.

Valve arrangement: sectional view

What are the complaints about the operation of the water heater valve

All claims arise due to several reasons:

part quality;
very high pipe pressure;
incorrect valve setting;

If the safety valve for the boiler is already included in the kit, then its quality will be good. Only with a separate purchase can you stumble upon an unfinished product.

How does the water heater safety valve work?

The operation of the water heater safety valve is very simple and anyone can figure it out. When the water pressure increases, the valve spring moves to an element that closes the hole and allows the liquid to enter the tank. If the water is turned off, the container will still remain filled, since the check valve will not allow it to drain through the pipes.

Another spring, on the contrary, affects the process of water discharge, but only if the pressure in the device has increased. How it works? The pressure compresses the spring mechanism and the water drain hole opens.

Description of check valve for home water heater

The water heater check valve contains two springs, which are located in one metal housing.

Check valve assembly

The larger cylinder is installed in the direction of the water. There is a valve that does not allow water to go back. On the side of the supply there is a section with a thread for tapping into the water supply system – “dad”. On the other hand, to be “mom”. It is installed on the branch pipe from which cold water is supplied to the boiler.

The perpendicular cylinder contains a spring with more power, although it is smaller in size. This is considered the check valve of the part.

Steps to take before installing a safety valve on a water heater

To install a safety valve, it is worth following a few instructions to protect yourself.

The element is mounted on a pipe that supplies water to the tank.
The part is placed between the stopcock and the inlet.

Location of the safety valve

Pay attention to the direction of the arrows.
All connecting areas are treated with sealant.
The thread must be tightened firmly, but without pressure, so as not to strip.

Do I need a check valve for sewage and how to install it

Sewer check valve installed to avoid flooding. This part can be installed both on the entire sewer pipe and on a specific device.

Please note the following when installing:

Arrow with water direction.
Fluid must move from the instrument to the drain.
Check the appliance for leaks.
If you hear noise or vibration, replace the part shutter.

Why just a non-return valve is not enough

It is strictly forbidden to install only a non-return valve in the instructions for the device.

Failure to use the standard safety valve with backbolt may cause an explosion when the boiler heats up.

Safety valve

It is also important to have a safety valve so that at a critical pressure level this part drains the liquid to stabilize the pressure.

The second option for installing a non-return valve

This method is used for aesthetic purposes. You will need flexible piping and ball valves.

Wrap the pair of flax tow and oil it.
Fit the stopcock and tighten with a wrench.
Screw on the valve. Make sure the lever is in a comfortable position.
Connect flexible wires.
Boiler can be switched on.

Tips for successfully installing a non-return valve on a boiler

Do not install a valve between the valve and the boiler.
Flexible drain tube goes into the sewer.
The ball valve is mounted so that the liquid drains faster.
It is important to install a safety valve and not to confuse it with a conventional non-return valve.

How to choose a model

Usually the fuse is already included in the kit, but if you need to change it, then it is enough to know only a few points:

boiler model;
ultimate pressure;
thread diameter.

Other types of valves

There are three types of fuse valves:

Types of valves

Boiler fuse up to 50 l is a standard disposable valve. He does not understand and his service life is very short.
Valves up to 200 liters are more serious. The building has two mechanisms with different purposes and an additional nozzle for supplying to the sewer drain.
The plug for boilers over 200 liters is a serious piece of equipment. It consists of a pressure reducing valve, a drain device and several adapters. This type of fuse is installed in industrial production.

What to do if the valve is leaking

When asking this question, it is necessary to clarify “when does the fuse leak?”. If it drips from the valve when the water heats up, this is normal. More details in the video.

Safety valve device

The safety valve is very simple in design. It consists of two spring mechanisms in one metal case.

What metal the construction will be made of is not so important. It is better to choose brass, it is longer and of better quality in terms of service life. The springs inside are made of chrome steel.

Types of safety fittings

Users often confuse safety and check valves. Although their purpose is different. The safety valve protects other parts from bursting. It also creates a barrier to return fluid back.

There are several types:

spring;
magnetic spring;
lever;
lever-weight.

Only spring valves are used for the boiler. They may look different, but inside they have the same content.

Briefly about the main

The safety valve is an important part for efficient operation of the boiler. The safety of people and homes depends on his work.

The main thing is not to confuse the safety and non-return valve and carefully follow the installation and operating instructions.

In the event of problems with the valve, it is better to call a specialist.

Are you using a fuse or are you confusing it with a non-return valve?

Author

Gennady Alekseev

Speciality:
Engineer

All articles

Safety valve for a water heater: installation and connection

Storage water heaters are installed not only in private houses that are not connected to central communications, but also in apartments for a comfortable waiting for the completion of repairs planned by public utilities.

For the safe operation of hot water equipment, it is necessary to purchase and install a safety valve for the boiler that protects the household appliance from pressure surges in the cold water supply system. In addition, this valve is also called a check valve, since it prevents water from flowing back from the storage tank in the event of an emergency shutdown.

Therefore, if there is no water in the cold water supply system, you can not worry about the safety of the electric heating element. The heating element will not remain “dry” and will not burn out. The presence of a safety valve will allow you to easily drain the water from the boiler if you need to clean the tank from accumulated deposits in the process of heating water or replace a heating element that has served its time.

A serviceable safety valve is able to ensure long and stable operation of storage boilers.

Contents of the article:

Safety valve safety features
How does this valve work?
Power consumption without check valve
How to connect the water heater
- Alternative way to install the check valve
- Tips for using the water heater
- Constantly dripping water – what to do and how to fix it?
Problems and solutions

Protective functions of the safety valve

In the process of heating water in the storage tank of the water heater, its volume increases. In a closed system, according to the laws of thermodynamics, as the temperature of a substance increases, so does the pressure level.

To control the water temperature in boilers, manufacturers install temperature controllers and thermostats on manufactured products. If these devices fail, then the water in the tank will boil, which will lead to a noticeable increase in pressure and an even greater heating of the liquid.

The avalanche flow of the described process, in the end, will lead to the formation of a crack in the walls of the storage tank, through which some of the hot water will pour out. The vacated space will immediately be filled with cold water coming from the plumbing system.

This will cause the entire liquid in the tank to boil instantly, accompanied by the release of a huge amount of steam and, as a result, the explosion of the container, bursting under its influence.

The safety valve will prevent the pressure from exceeding the allowable values by dumping part of the liquid into the sewer system.

In addition to ensuring the integrity of the equipment in critical situations, safety valves perform several other important functions, which include:

preventing the return of heated water from the boiler back to the water supply;
smoothing cold water pressure surges at the inlet to the water heater tank, which prevents the possibility of water hammer;
dumping excess liquid from the tank at the time of a critical increase in temperature and pressure;
providing the possibility of draining water from the storage tank of the water heater for scheduled preventive maintenance and necessary repairs.

Valves currently produced by manufacturers are available in a variety of designs. The kit, along with the main product, may include pressure gauges, various shut-off valves, etc.

When choosing a safety valve for a boiler, one should take into account the fact that the purchased device must correspond to the parameters of the hot water supply system in operation in the house.

The diagram clearly shows the design of a safety valve for a water heater (boiler), all elements of which are provided with pointers with inscriptions

How does such a valve work?

The boiler safety valve also functions as a non-return valve, which is reflected in its design. Schematically, the product can be represented as two thin-walled cylinders located at right angles to each other, having different sizes, endowed with a common working cavity.

If you look inside the larger cylinder, you can see the check valve installed there, the design of which includes a poppet, a spring and a seat machined into the body of the product. The thread applied on both sides of this part of the protective device allows it to be connected to the inlet pipe of the electric boiler.

The smaller cylinder also contains a shut-off device similar in design to the check valve described above, except that it has a stiffer spring.

Most relief valves have a function to adjust the opening pressure by changing the compression ratio of the spring. The drain hole is located directly behind the locking mechanism. It is recommended to connect a transparent tube to this hole, which allows you to observe the water discharged from the tank.

Three-angle view of the design of the safety valve used when connecting storage type water heating equipment

The safety valve is operating according to the following algorithm.

In the open position of the valve mounted on the inlet line, water flows freely into the tank through the hole, resulting from the retraction of the check valve disc from the seat. At the same time, the incoming liquid does not have access to the drainage hole, because the safety spring has a stiffness designed for a higher pressure compared to the plumbing value of this value.
At the moment the boiler is completely filled, the pressure level in the tank and in the line is equalized, due to which the check valve closes. An increase in the temperature of the heated water in the storage tank causes an increase in the pressure force on the check valve disc, which is even more tightly pressed against the seat. Therefore, the heated water cannot return to the cold water supply pipes.
When users begin to use domestic hot water, the pressure inside the water heater starts to drop and reaches a value less than the water supply value. At this moment, the plate is wrung out from the saddle and the process of filling the tank with water begins.
If the thermostat breaks down, an uncontrolled rise in temperature will begin, which will cause the pressure to rise to a critical level. Here, as a result of the compression of the safety valve spring, it will be possible to drain excess fluid through the drainage hole into the sewerage system through a transparent hose.

A small lever is needed to force the opening of the drain hole, through which water is discharged and the pressure is reduced

Electricity overrun without non-return valve

A hot water system with a water heater can function without a shut-off valve, but then, in the event of a pressure increase, hot water will be squeezed into the supply line. This will lead to an overrun of electricity, because the device will have to heat more water.

Extra kilowatts wound up will have to be paid, which will not add joy to the owner of an apartment or house. In addition to the financial side of the matter, there are also practical inconveniences. After all, instead of cold water, warm water can run from the taps.

These problems must be added to the disadvantages that were described above. Therefore, do not agree to the installation of a water heater without installing a safety valve.

The cost of this brass product is incomparable to the cost incurred to purchase a boiler.

The information on the safety valve body helps you choose the right part for the first installation or replacement during the repair of the water heater

How to connect the water heater

After installing the water heater, start connecting it. To do this, they take a tee, try it on, winding it on the cold water inlet, marked in blue. If there is not enough thread, then a few turns are added with a special device so that the tee is set correctly.

Then the thread is wrapped with tow, coated with a paste that ensures a tight connection, and the tee is screwed on, tightening it with an adjustable wrench. Next, a tap is screwed onto the side outlet of the tee to ensure that water is quickly drained from the boiler in case of replacing a burned-out heating element or cleaning the tank from scale.

The connection is also sealed with tow or tape for threaded connections. From below, a safety valve is connected to the tee, focusing on the arrow showing the direction of cold water entering the water heater. The arrow is located on the valve body.

Next, one part of the American is screwed onto the safety valve. The second part of the American is screwed onto the tap and a connection is made with the first part. Then, an adapter is screwed into the faucet for connection to the water supply with propylene pipes.

Next, connect to hot water. To do this, they wind the first part of the American on the outlet pipe of the boiler, marked in red. The second part of the American is wound onto the shut-off crane. Perform the connection.

Then the adapter is also screwed onto the valve to solder the propylene pipe. It remains to connect the boiler to the cold and hot water supply system. Propylene pipes can be replaced with flexible pipes.

The diagram of connecting a water heater (boiler) to hot and cold water supply systems shows the sequence in which the device is installed

Alternative way to mount check valve

This method was invented by a DIYer who had a problem with the safety valve being contaminated by sediment from a pressurized hot water tank. If a piece of rust gets under the piston plate on the seat, then the valve can no longer work correctly. It remains open all the time.

In order to prevent such a development of the situation, it is necessary to mount the valve at the level of the middle of the tank. That is, in the same way as described above, a tee is connected to the inlet pipe of the boiler, and then the connection is made a little differently.

The drain cock is screwed on from below, and the pipe is taken to the side, corners are put, again the pipe, and somewhere at the level of the middle of the tank a safety valve is installed. After it comes a shut-off valve and a fitting, through which the device is already directly connected to the water supply.

This way the valve always stays clean and the poppet piston does not “hang” over the seat. In addition, in the absence of water in the system, such a curved connection serves as a kind of water seal.

See the video for more information on this mounting method.

Water heater operation tips

When operating the boiler, make sure that the drain hole on the safety valve is not clogged or blocked. The drain can become clogged with rust, small solids and other impurities found in tap water.

To check its working condition, periodically discharge a small amount of water by pressing a special lever or turning the handle. The instructions attached to the water heater safety valve indicate how the valve’s forced opening mechanism functions.

Installing a tap water filter solves part of the problem. It is undesirable to change the factory settings of the spring stiffness in valve models endowed with such an adjustment.

Such interference may lead to the destruction of the water heater tank due to the excess of the permissible pressure values inside the household appliance.

Forced discharge of water from the boiler in order to reduce the pressure in the tank is done by pressing the lever

Water is constantly dripping – what to do and how to fix it?

Some boiler owners are faced with the problem of constant seepage of water through the drain hole. Water can drip from the drain for two reasons:

incorrect valve setting;
too high pressure in the cold water supply system.

The first problem is solved by replacing or adjusting the device, which must be done with a hex wrench. At the same time, the clamping nut located at the inlet inside the valve is slightly tightened.

This nut can be accessed by partially disassembling the device, which removes the lever, nut and sealing washer. In general, you can solve the problem faster by buying a new valve.

The second high pressure problem in the system disappears when the pressure reducing valve is installed.

Connection of a tube with transparent walls to the drainage hole without leading it into the sewerage system0003

Problems and solutions

The cause of the incorrect operation of the water heater should be looked for as soon as the first signs appear. It is advisable to test all elements of the household appliance, starting with the thermostat, safety valve and heating element. Most often, it is these parts of the boiler that break.

If the valve breaks down, the masters advise not to save money by repairing the part, but to immediately purchase a new analogue. The model is selected according to the pressure level for which the valve is designed, indicated on the body of the product. This information is also indicated in the safety valve instruction manual.

There are situations when the valve does not function due to a hidden marriage, which is not possible to identify. It is not worth spending time searching for a defect in the design of the part, since the boiler must be operated for its intended purpose.

Therefore, the defective valve is replaced with a new device. If the resource of the installed safety valve is exhausted, then it is also dismantled and a new device is installed. By changing the valve, you can not worry about how the water heater works.

The supplied part will ensure reliable and safe operation of water heating equipment.

The disassembled safety valve allows you to see the screw, which adjusts the degree of spring stiffness with a screwdriver. After reading the article and watching the videos, you can do everything yourself, saving on paying for installation work done by third parties.

If you think that everyone should do their job at a professional level, then invite specialists. Experienced craftsmen will help you choose the right safety valve model, buy the missing fittings, connect the boiler to cold and hot water in accordance with construction standards.

Do not listen only to those unfortunate masters who consider safety valves to be unnecessary links in the piping chain of a water heater connected to the water supply. Never skimp on your safety!

The safety valve on the boiler is leaking. What caused? What to do?

December 11, 2020

Throughout the long millennia of his existence, a person strives to improve his life, tries to make it as easy and comfortable as possible. Of course, the concept of comfort in modern people is inextricably linked with the presence of hot water. Here it is enough to remember yourself standing in front of the tap and helplessly pulling the handle of hot water while it is turned off. To avoid such a sad situation, a boiler was invented. Installed in apartments or cottages, it regularly provides residents with hot water, but they are often frightened when they see that the safety valve on the boiler is leaking. Below we will try to understand this problem.

Boiler device.

First you need to understand the principle of operation of the boiler itself – there is nothing complicated in it. The boiler is a kind of heated thermos. A cylindrical container is enclosed in the outer shell (Recently, tanks are often made of stainless steel, although a large number of water heaters still have an enamel coating), lined with a good heat insulator – the classic version of foam rubber or polyurethane foam. Good thermal insulation can significantly reduce the cost of heating water, for a long time, maintaining its temperature at the desired level. The method of heating the tank depends on the type of boiler – electric or gas. In the first case, an electric heating element is used, and in the second, a gas burner. Heating and water supply are made at the bottom of the tank, while hot water rises to the top, from where it is taken.

Safety valve. Why is it needed?

Safety valve consists of check valve and safety valve. The task of this device is to prevent a possible explosion of the boiler, which can adversely affect both the budget and health. An explosion can occur due to too high pressure inside the tank, which is created due to an increase in the volume of heated liquid and an uneven pressure of water entering the boiler.

Design and operation of the valve.

The valve itself, consisting of two cylinders, has the form of an inverted T. The first cylinder – regulates the flow of water into the boiler using a spring and a poppet attached to it. As long as the pressure in the water supply exceeds the pressure inside the tank, the flap remains open, there is enough pressure to move the spring. Accordingly, as soon as the pressure in the boiler becomes higher than the pressure in the pipe, the situation changes, and the spring “closes” the flap. This valve is called reverse. The second cylinder, running perpendicular to the first, and called the safety valve, likewise consists of a spring and a damper. The spring in it is designed for a certain pressure, and as soon as it is exceeded inside the tank, the spring is compressed, opening the damper and the water that flows out of the boiler begins to drip from the tap. As a result, the pressure inside the tank drops to normal values.

Causes of “leakage” of the safety valve.

In fact, there are only two main causes of valve leakage:

Valve failure, clogging.
Excessive line pressure.
Temporary overpressure in the boiler.

It is only in the first and second case that you should be concerned, since leakage due to overpressure is only an indicator of good and trouble-free operation of the valve, thanks to which the boiler remains safe and sound.

Signs of valve failure.

The following signs will help you recognize a broken valve:

Water flows continuously, even if the boiler is not used by anyone.
The “descent” of water is the same both with intensive use of the boiler and with little.

Possible remedies for leaks.

In any case, you should not rush and immediately change the valve, especially if it is an expensive and high-quality model. If the valve is dirty, you can try troubleshooting with these simple steps:

As a temporary remedy, you can try to open the emergency release lever and flush the water. In the event that scale or other small objects prevented the sash from closing tightly, then there is a chance that some of them will wash out and the valve will stop leaking.
In the event that the cause of the breakdown is contamination, and the valve model is collapsible, you can try to disassemble and clean it. Before this, it is imperative to disconnect the boiler from electricity, disconnect the water supply and drain all the water. Also, the removed valve can be washed under running water and immersed in a special cleaning liquid.

It should be noted that cheap valves break much more often than expensive ones and the breakdown will not necessarily be associated with a constant flow of water from it – the valve, on the contrary, clogged with scale, does not let it pass, as a result of which it will no longer be able to cope with its task.

Overpressure in the water supply.

Excessive pressure in the water supply can cause water to constantly drip from the valve. To make sure that this is the problem, it is necessary to measure the pressure of cold water with a pressure gauge before it enters the boiler. Indicators of 1.5 – 3 atm are considered normal. If these indicators are higher than those for which the boiler is designed, then it will be much more difficult to correct the situation with valve leakage, you will have to install a pressure reducer, with which it will be possible to reduce the water pressure.

Conclusion.

Moderate leakage of water from the safety valve is normal and indicates that it is working. To drain it, a tube is usually attached to the valve fitting, the other end of which is led into the sewer. Remember, using the boiler without a safety valve is dangerous!

New comment

Submit

device, protection functions, installation instructions

The main function of the non-return safety valve in the water heater system is to compensate for the increase in the volume of water in the tank during heating and prevent its return to the water supply, additionally – protection against pressure drops in the supply line or operation of heating elements in the absence of water supply . On the piping diagram, it is located between the shut-off valve and the inlet pipe of the boiler; it is prohibited to place tees or other valves in this area. Its presence is mandatory, this device serves as direct protection against emergencies. The choice of a specific type of valve for a water heater depends on the volume of the storage tank, for the called manufacturers it is included in the standard kit, but if necessary, it is enough just to buy a replacement and install it on your own.

Contents:

What is it?
Types and features
Valve Replacement Instructions

Description and purpose

The design includes two parts, outwardly they resemble perpendicularly connected cylinders with different diameters. The larger one acts as a check valve and consists of three simple elements: plates, seats and springs. When cold water is supplied inside the water heater, it opens, after filling and exceeding the pressure above the water supply, it closes automatically. When HW is consumed, the process is reversed and the tank is filled again. It is impossible to use only this type of protection, as well as to install stopcocks to turn off the check valve (leads to overheating of heating elements in an empty water heater). Does a cylinder with a smaller diameter have a tighter spring when the internal pressure exceeds the standard? the drain opens and excess water is discharged, a suitable hose is connected to prevent hot water from escaping into the open space.

Thus, the use of valves implies protection functions:

Against pressure drop in the supply line, water hammer and air ingress into the heater.
From boiler overheating and boiling inside the tank.
Prevent hot water from entering the supply pipe.

The higher the volume of the water heater, the more excess liquid is discharged. For example, for a boiler of 100 liters, this value reaches up to 3-4 liters per day. During operation, you should pay attention to possible signs of breakdown, in particular: poor transmission or its complete absence, leakage in cold mode.

The main criterion for selecting a valve for a water heater is the operating water pressure (both in the water supply and inside the tank). Depending on the volume of the boiler, the following capacities are used: up to 50 liters, from 50 to 200 and above 200. Accordingly, the protection class is selected from these indicators, experts recommend purchasing the most reliable devices for water heaters with a large volume, regardless of their cost. According to the principle of operation, all check valves are divided into direct and folding. The first variety is a butterfly valve with vertical movement (they work only under the pressure of the working medium), the second – with placement under the saddle.

According to the degree of complexity, all return and safety components for a water heater differ in:

1. Non-separable – the simplest budget option, water shutoff is carried out due to the resistance of a spring or disk. This is a classic check valve and nothing more, such protection is only allowed for water heaters with a minimum volume, its main function is to keep the heating elements from overheating when the tank is empty. When installing such devices, the working condition is necessarily monitored; at the slightest suspicion of a marriage or breakdown, they change. This variety is not suitable for collecting excess pressure; for these purposes, you need to buy a separate safety valve.

2. Sophisticated complex for a water heater that combines both functions. It includes a ball valve, safety and shut-off (check) valves, outlet for draining. The process of controlling discharges of excess heated liquid is visual, not automated, and the protection efficiency is high. The disadvantage of this group is the flow of water onto the floor; to eliminate such a problem, additional equipment is required with a flexible hose connecting the outlet valve directly to the sewer.

3. Hydraulic safety group, the main difference is the inclusion of a pressure reducer in the water heater piping circuit. Also included in the kit: safety and non-return safety valve, siphon. This option is selected for industrial systems, the group is placed on a pipe with cold water. The presence of a siphon allows you to easily drain the excess directly into the sewer.

Replacement Manual

This procedure is required when physical wear, spring weakness, salt build-up, or defective part. Another reason for the constant leakage of the check valve is associated with excessive pressure in the supply pipe, in this case it is recommended to install a reducer. Leaving a breakdown for a long time is fraught with the same consequences as in the absence of a fuse. The replacement process is carried out according to the following scheme:

1. Water heater power off.

2. Blocking the supply to the device: at the entrance in front of the boiler or common around the apartment.

3. Complete emptying of the storage tank.

4. Dismantling (unscrewing) the old safety valve.

5. Installation of a new one, sealing with sealants, linen tow or fum tape. The thread is turned with a key 3-4 times.

6. Water supply, checking the tightness of connections.

The correct direction of water is easy to determine: most devices have a red arrow, and this information is also duplicated in the attached instructions. Before starting installation, it is recommended to check the operation of the unit; in the process of tightening the connection of the relief and check valves, do not put pressure on the thread or exert excessive force. It is easy to check the reliability of a new fuse – a full tank of the water heater is filled and the maximum temperature is set (at 30-40 ° C, the device may not work, especially with small volumes of the boiler), after a while the discharge begins to drip.

But for complex hydraulic groups, other installation and control schemes apply, in this case it is important to follow the manufacturer’s instructions. For obvious reasons, the installation of only a check valve in the water heater system is unacceptable (as well as the installation of heating fittings), the presence of an output to relieve excess internal pressure is mandatory.

Date: July 27, 2016

Water heater check valve – Selection and function

Contents
Water heater check valve
Simplest non-return valve arrangement
How the boiler works and the safety valve
How to choose the right check valve
Water check valve installation
Mounting check valve

It is difficult to imagine our normal life without hot and cold water. If the house has a well or well, then it’s time to think about installing a boiler. Installation of the water heater can be done by hand.

The person who will install the water heater must know how important it is to install a safety check valve for the water heater. No matter how terrible accidents related to heaters are, there are still people who believe that they do not need advice. They will consider this information unnecessary.

As much as we would not like, but still, there are very important details in the installation of a water heater.

The most searched question on a water heater search engine is “water heater non-return valve”. It would be more correct if we are talking about a safety valve. These two devices have some similarities, but at the same time, they are different. The main task of the device is to make the use of the boiler safe.

In front of you you see a cylinder cast from metal, with two edges there is a thread for “packing” into a straight section of a pipe of the corresponding caliber.

Next we see the so-called poppet valve. It has the shape of a disk, along the edges of which there is rubber for sealing. The stock is located in the center. Such a valve device allows it to block the internal flow of water.

Designed to prevent water from flowing backwards. The principle of operation is the following. If the water runs in one direction, it presses on the spring. The spring is compressed and the valve lets water through. If the water runs in the opposite direction, the spring is not deformed and the valve does not let water through. Since the mechanism is not visible from the outside, in order to know in which direction the water is moving, an arrow is depicted on the valve. Most often it is embossed.

This way the water will flow into the boiler and never run back into the water supply. However, what happens if the pressure is too high? In this case, one check valve alone is not enough.

The boiler or electric water heater is very finely tuned. If too much water enters it, it will break due to high pressure. Therefore, an additional check valve is needed. Given that this combination is very popular, they were combined into one “safety valve”.

His arrangement is as follows. There is a thread on the water inlet. It allows you to wind a water supply pipe or even a hose onto the valve. At the water outlet, which is connected directly to the boiler, there is a threaded coupling. This makes it easier to put the valve on the boiler tube.

Perpendicular to the direction of the water in the valve, there is a brazed metal cylinder below the poppet valve. There is a hole on the side of the cylinder. And inside the cylinder is a “stall” valve. The device of the “stall” valve is the same as that of the check valve. But the spring of the “stall” valve is much stronger, and only allows water to pass when the critical pressure is reached. In this case, the water will exit through the above-mentioned hole on the side of the cylinder.

The hole on the side of the cylinder or nozzle is often embossed so that a hose can be put on it and discharged into the sewer.
From the outer top of the cylinder there can be a brazed flat or a screw plug with an adjustable screw. But most often you can observe a lever in this place. It is available for manual discharge of water through a nozzle.

It is often written on the safety valves at what pressure the “stall” valve will open and release “excess” water.

How the boiler and safety valve works

1. Once the electric water heater is installed, it can be operated. To do this, you first need to fill the tank with water. The pressure in the water supply system will be enough for the check valve leading to the boiler to let the water through.

Air will then be expelled from the boiler. Therefore, be prepared that the water will not immediately come out of the mixer. The pressure will be created due to the cold water supporting from the water supply system. As soon as the water has gone, close the mixer and wait. Once the tank is full, the internal pump in the water heater will turn off and the water inside will be heated. By heating the water, steam will be generated, which will create sufficient outlet pressure when the hot water tap is opened on the mixer.

2. Assume that the relief valve is not installed. If pressurized water does not exit through the faucet, it looks for another way. This way is a water supply pipe. It has much less pressure, so hot water will begin to flow in the opposite direction, and boiling water will flow from all taps, while cold water is installed on the mixer. The boiler will heat all the water in the pipes, because new water will constantly come. And the internal thermometer will show that the water needs to be heated. And the electricity bill will be exorbitant.

3. It happens that the water disappears. We have to wait for the plumber to come and fix everything. But, while there is no water, it is very dangerous if the valve is faulty. If the valve is defective or missing, all the water will flow out. Well, if the sensor turns off the heating. But this may not happen. Then the air will heat up. This will either burn out the heating element or crack the enamel.

4. A logical question arises: is it possible to install only a non-return valve?

No, that would be a disaster. If you see such a picture, know that a disaster can happen at any moment.

What can happen?

When the boiler is filled with water and heated, steam is released. The pressure builds up inside. Often, the manufacturer provides for the heating temperature and the corresponding pressure.

If the pressure rises to a critical point, the valve will open and excess water will flow out through the “stall” valve. And the pressure in the boiler equalizes.

If the pressure rises and there is no way out, this promises another problem: with internal pressure, the boiling point of water also rises.

If the pressure continues to rise, the water heater will become a real bomb and burst from internal pressure. The consequences in this case are devastating.

At 4-5 atmospheres, the boiling point is already 150 degrees Celsius. After that, you can expect the boiler to swell. The walls will bend, causing the enamel or ceramic coating to crack.

But much worse is a sharp drop in pressure. As mentioned above, pressure reduction and boiling point are closely related to each other. As soon as the pressure drops, the temperature will remain the same, and it will be more than enough to turn all the water inside the boiler into steam in a matter of seconds. What will cause the explosion.

It can occur because, while the pressure was growing, the seams along which the structure was soldered cracked, and the rubber was torn. A sharp drop in pressure can also occur simply from the fact that you open a hot water tap.

Conclusions regarding the need for a valve:

1. Water from an electric water heater does not flow back into the pipes if the pressure in the pipes is lower than in the boiler.

2. The valve protects the boiler from water hammer and pressure surges.

3. The safety valve ensures the safe use of the boiler if other safety systems fail. It also maintains the temperature-baric balance.

4. If the specific valve model has a lever, you can manually drain the water if needed.

How to choose and install the valve

As a rule, the valve is supplied with the boiler itself. In this case, if the valve is faulty, you simply go to the store with the faulty model and ask for a new one. If the valve is not completed, you should look in the documentation. The documentation describes what pressure is the limit for the boiler.

It is also impossible to take valves “with a margin”. If the valve is designed for less atmospheres than indicated in the documentation, the stall valve will open at operating pressure, and water will flow out constantly. This can also affect your water bills.

If the safety valve shows more atmospheres than the maximum allowable, this valve will not save you from a boiler explosion.

To install, connect the valve to the cold water connection on the boiler. As a rule, the cold water pipe on the boiler is blue.

Use linen tow and sealing paste to seal the connection. If your wiring is bendable, a rubber gasket
is enough. Alternatively, you can insert a drain valve between the valve and the water heater. This will greatly facilitate the work with the boiler or just preventive maintenance.

The only thing to watch out for is that:

1. The valve must not interrupt the flow between the boiler and the valve. Shut-off valves in this place are unacceptable.

2. The valve must be installed on the branch of the tee.

Water check valve installation

Boiler piping. Step by step.

There are two ways to tie the water heater. Both will be presented below. And in both cases it is clearly seen that a safety valve is indispensable.

1. Before choosing a boiler, you need to choose the space you are willing to make for it. It can be either a wall or floor boiler. Measure the space that you are ready to allocate for the boiler, and with these measurements go to the store.

Please note that when the boiler is installed, it must not interfere with turning around in the bathroom.

Also note that there must be enough space for the plumbing. You also need a place for electrical wiring. Very often a separate power cable and a separate machine are installed.

2. Knowing the height of the water heater, you can calculate where the bottom of the heater will be.

3. There are fasteners on the back of the boiler. Most often it is a bracket. The bracket has two holes on the same level. Hooks are used to attach it to the wall. Sometimes other fastening methods are used. Often, installation instructions are included with the water heater.

4. Making the markup. We measure the distance from the bottom edge of the boiler – to the bar. We transfer the distance to the wall. In this case, we use as a starting point the mark, which was mentioned in the second paragraph.

5. Use a spirit level to draw two horizontal lines at the level of the brackets.

6. Measure the distance between the hooks. Often this is 20 cm. But it is better to have some play in order to adjust the position of the boiler later.

7. Transfer the distance between the holes on the bracket to the wall. Namely, on the horizontal lines outlined in paragraph 5. If possible, it is better to avoid joints between tiles for drilling a hole for the hook. Otherwise, a crack may occur during drilling.

8. The following hooks are used for suspension: the outer diameter of the dowel is 14 mm, and the hook in it is 8 mm. The length of the fastener is 8 cm. But often the hooks are included.

9. Holes are drilled in the marked places. Dowel plugs are inserted into the holes. Hooks are twisted into dowels.

10. Screw the hooks to such a depth that the boiler does not run over them, but not point-blank.

11. Boiler hanging. Below we see two pipes: red – hot water outlet, blue – cold inlet.

12. The master can install an additional tee valve to the branch pipe. It, as mentioned above, will allow the device to be prevented. Before installation, a measurement is made: the number of revolutions is counted before the tee falls into its place.

13. The tee is fixed with tow and Unipac paste.

14. Tee “packed”.

15. Tow is wound on the perpendicular outlet, the paste is spread and the tap is screwed on. For reliability, when twisting, it is necessary to make at least 3 turns. The handle should eventually be available for operation.

16. When installing the safety valve, please note that the arrow on the valve must point in the direction of the boiler during installation.

17. The relief valve is screwed directly to the bottom of the installed tee. At the same time, the water flow is not interrupted, and the rule of the absence of shut-off devices between the valve and the boiler is observed.

18. It is desirable that the strapping be collapsible. This will allow you to turn off the device at the right time, and remove it. To do this, ball shut-off valves “American” (sleeve nuts) are on both entrances.

19. Attach a tap with a union nut to the safety valve inlet. In turn, a fitting will adjoin the fitting to put a pipe on it. Also, it will be very easy to disconnect it later.

20. The fitting that attaches to the valve can be angled 90 degrees. Thus, the pipe can directly adjoin the wall. Naturally, if you use one fitting at 90 degrees, you need to buy a second one – so that the pipe is located along the wall.

21. A conventional fitting is installed on the hot water outlet with a transition to a polypropylene pipe. This is done for the sake of aesthetics – so that the pipes “bend” at the same level. Therefore, two fittings with an angle of 9 will also be installed below0 degrees.

22. Welding work is in progress. Pipes are brought to the branch pipes, which will divert hot and cold water, spreading it around the house.

23. You can connect the boiler to the socket, it will heat the water. If possible, a PVC pipe is connected to the branch pipe on the safety valve, the second end of which is lowered into the sewer, toilet bowl, etc., so as not to wet the floor.

Check valve assembly. Second variant

The second mounting variant is the flexible connection.

1. Sometimes the pipes are hidden in the wall for the sake of aesthetics, and only two pipes are visible from the wall, to which the boiler must be connected. Ordinary ball shut-off valves are installed on the nozzles.

2. For fastening, the spigots are wrapped with linen tow and coated with Unipac paste.

3. The valve itself is put on the nozzle by hand, and then tightened with a wrench. In this case, the lamb should be located on top.

4. On the inlet pipe of the boiler – winding.

5. Installation of safety valve with lever. Yes, you can do without the tee, which was considered in the first version. Although at the same time it will take much longer to dry the boiler for prevention. But it’s cheaper.

6. The valve is screwed onto the tow and tightened with a wrench. Watch the lever – it should be conveniently located. We won’t need more linen tow.

7. Flexible wiring connection. Corrugated stainless steel hoses are considered eternal. Rubber tires are often counterfeited, which causes particles of rubber for tires to be in the water. However, to avoid this, do not be afraid to bend the tube all the way in the store. If it is of high quality, it will not break.

When going to the market, measure the length that is enough to connect the boiler to the pipes in the wall.

Connect the flexible wire by hand to the red fitting, and then tighten everything with a wrench ¼ or 1/3 turn. If you pinch it, the rubber gasket will let water through.

8. Connect the flexible cable at the bottom to the hot water faucet connection.

9. Connect the flexible wiring from above to the bottom connection of the relief valve. Connect the lower end of the wiring to the cold water faucet.

10. You can start using the boiler. Do not forget to drain excess water from the safety nozzle into a container so as not to wet the floor. Or connect a PVC tube, as indicated in the first option.

Frequently Asked Questions

How to deal with water drops from the drain pipe?

None. This indicates that the valve is functioning well. The water drips clean from there, so you can connect the tube and lead it into the toilet bowl. You can also take it down the drain.

Can the valve be mounted so that it is not visible?

Yes, but the following rules must be observed:
1. There must be no shut-off valves, etc. between the valve and the boiler.
2. The distance from the valve to the boiler must not exceed 2 m.

The drain valve leaks too often, although the temperature is not very high. What to do?

The reason may be one of two:
1. The valve is designed for too little pressure.
2. Over time, the spring has weakened, and the valve just needs to be replaced.
3. The pressure in the water supply system is too unstable. Because of this, the valve may just work. To balance the water pressure in the pipes, install a pressure reducer. It will also help you save a lot of water, which can flow unevenly, in jerks, and damage your plumbing.

Can I try to adjust the valve myself to the correct pressure?

Not permitted under any circumstances. The setting is too fine. And with the wrong setting, you can not guess that the pressure is set incorrectly. As stated above, incorrect pressure on the valve leads to disaster.