What is a silent check valve?

Silent check valves, also known as non-slam check valves and spring-assisted check valves reduce or eliminate water hammer and its effects. Water hammer refers to the high-pressure shock waves that occur when the flow of fluid abruptly stops (due to pump shut down or a valve disc quickly closing) in a piping system.

Why does check valve make noise?

If you hear a loud noise every time you pump stops, you have a Standard Check Valve installed. That noise is the check valve closing which creates a slamming effect when the water flow reverses in the discharge pipe after the pump stops.

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.

What are the different types of check valves?

Read more about the different varieties of check valve types below.

Ball Check Valves.
Globe Valve.
Dual Plate Check Valves.
Lift Check Valves.
Piston Check Valves.
Stop Check Valves.
Swing Check Valves.
Tilting Disc Check Valves.

What are the 2 types of pressure check valves?

Different types of pressure control valves include relief, reducing, sequence, counterbalance, safety, and unloading. All of them are typically closed valves, except for reducing valves, which are usually open. For most of these valves, a restriction is necessary to produce the required pressure control.

What are the three different types of check valves?

Check valves are unidirectional valves that provide unobstructed flow in one direction as long as flow pressure remains constant and protect the piping system against reverse flow. The three main types of check valves we offer are ball, piston, and stop check valves.

How do I stop check valve chatter?

Check valves should be sized for the application, and not necessarily for size of the pipe. A poppet needs to be stable against the internal stop in the open or fully closed position. This helps stop chattering and prevents premature failure from excess wear.

How do you diagnose a bad check valve?

Symptoms of a Failing Check Valve For example, failing check valves will start to vibrate and even lose some internal parts when problems begin to arise. Other symptoms of check valve failure include reverse flow and excessive component wear and damage. Check valves will also emit noises as they start to break down.

How far should check valve be from 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.