Is A Check Valve Required On A Sump Pump?

Without a sump pump check valve in place, all the water in the discharge pipe empties back into the sump pump pit liner. This causes the water level in the liner to rise. Higher water levels in the sump pit liner causes the pump to run more often, increasing energy costs.

Does a sump pump have to have a check valve?

The larger the pit volume below the level of the 4 inch drain pipes dumping in, the less of a need for a check valve since the water falling back down when the sump pump shuts off is a lesser percentage of the pit volume. Except if two pumps (e.g. main and backup) share the same outlet pipe then both need check valves.

Does a submersible pump need a check valve?

Check valves are designed to permit water to flow in one direction and are a requirement on all submersible pump installations. Their job is to prevent water in the column above the pump and in the pressure tank from draining back into the well when the pump shuts off.

Is a check valve necessary?

Do I need a check valve? A check valve is a valve that is used to prevent backflow in a piping system.Even if a pump does have a built-in check valve, we recommend that a check valve be installed in the discharge line within 25 feet of the pump and below the draw down level of the water supply.

When should a check valve be installed?

When a Check Valve Is Necessary
So when is a check valve necessary? Typically, we recommend a check valve when there is the potential for the media being transported in the pipe to backflow, which can damage the system. Condensate pooling can also lead to water hammer.

Where should a check valve be installed?

Check valve can be installed in horizontal or vertical piping runs, with the flow running upward. Mounting for vertical installations is critical.

What’s the purpose of a check valve?

‘ The main purpose of a check valve is to prevent backflow in the system. Figure 1 shows an example of a check valve. A check valve relies on a pressure differential to work. They require a higher pressure on the input side of the valve than the output side to open the valve.

What does a check valve do for a sump pump?

A check valve on the discharge line keeps water in the pipe from flowing back into the sump pit when the pump switches off. A check valve is sometimes referred to as a “one-way” valve because it allows water (or any liquid) to move in one direction only.

How close should the check valve be to the sump pump?

Best height ( unless owner’s manual states otherwise) is two to three feet off of the top of the sump pit. This way your sump pump motor doesn’t have to work as hard as when your check valve is in lower position.

Can I have 2 check valves on sump pump?

So with two check valves in parallel, you protect against the stuck-closed scenario (as it is unlikely that both check valves will fail in the same manner), but are actually more likely to have a stuck-open fault, since if either check valve fails open the discharge water can flow back into the sump well.

Does a check valve go before or after a pump?

The most common installation is at the pump. A check valve may be installed on the suction side of the pump to maintain the pump’s prime in the event of a pump shutdown. A check valve will be used commonly on the discharge of the pump to prevent backflow from the downstream system, when the pump shuts off.

Do I need a check valve on my chlorinator?

A check valve for a chlorinator is used to prevent chlorine gas from entering into the pool equipment. ALL CHLORINATORS SHOULD HAVE A CHECK VALVE ASSEMBLY. CL220 has a check valve assembly built into the discharge fitting. In addition, the black tubing, on the discharge side should be looped.

Where is check valve on sump pump?

Check Valve Basics
Check valves are usually made from metal or hard plastic. You can find them attached to the discharge pipe, although some may be mounted on the top of the pump. When a sump pump check valve is not working, water flows back from the discharge piping into the sump pump pit.

Do you need a check valve on water line?

Check valves used on well water system piping are used to hold pressure in the system when the pump stops. Check valves on well piping also prevent backspin of the well pump, water hammer and upthrust inside the pump.

Can a sump pump check valve be installed horizontally?

They can be installed in vertical or horizontal systems, depending on the type of liquid that you are removing. If you are pumping out solid or semi-solids, the check valve must be installed horizontally (up to a 45 degree angle).a Sewage system, different products may apply more.

What the difference between a backflow preventer and a check valve?

A backflow preventer is to be used in high hazard situations and is meant to fully protect the potable water with their fail safe design while a check valve is used in low hazard situations and prevents backward water flow but it does not have the same fail safe components.

What happens when sump pump check valve fails?

A broken or missing check valve can result in one-third to two-thirds of the water to flow right back into the pit! And that will overwork the pump. Continually flooding sump pit. – In rare cases, there is a continuous flow of water into the sump pit due to a high water table or an underground spring.

How do I stop my sump pump from banging?

Sump pump clanging can be caused by heavy vibration. You might consider wrapping the piping with insulation to dampen the sump pump clang. You might also silence a banging, clanging sump pump lid by adding rubber grommets underneath. Sometimes, the only way to silence the pump is to correct the discharge pipe position.

Does a check valve reduce water pressure?

Check valves are designed to prevent water flowing in one direction while moving somewhat freely in the other direction.In yet another style of check valve, water pressure compresses a spring-loaded disc in the fluid stream, pushing the disc back into the valve body and opening a path for the water to flow around it.

Do I need a check valve on my shallow well pump?

Do I need to use a check valve or foot valve with this pump? Yes. The check valve should be installed in the suction side piping as close to the source of water as possible.

Where do you put a check valve on a submersible pump?

In submersible pump applications, the first check valve should be installed directly on the discharge head of the pump or maximum one pipe length (20 feet) above pump. Water pumped and flowing through a piping system has a certain amount of energy (weight x velocity).