Silent check valves are an important part of any sump pump system. Installed in the discharge pipe leaving your sump pump, the quiet check valve prevents your pump from having to re-pump water it has already discharged.

How do silent check valves work?

A silent check valve utilizes a spring to assist the poppet in closing the check valve prior to fluid flow reversal. This eliminates the hydraulic shock also known as water hammer. Water hammer is a result of the sudden stoppage of flow in a fluid process system.

How do I know if my check valve is working?

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.

Why is check valve so loud?

Waste lines from a sewage ejector or sump pump use a check valve to stop wastewater from flowing back into the basin. When these valves shut, they can make a thud loud enough to be heard throughout the house. To quiet them, replace the old check valve with a “silent” or “soft close” check valve.

What causes check valve chatter?

Chattering occurs when the valve is oversized for the application and is one of the most common causes of check valve failure. … By knowing the temperature, pressure, media, flow rate, and viscosity we can help to determine the flow characteristics of the valve when in service.

Who makes the quiet check valve?

Zoeller Pump Company | Quiet Check Valve.

Do check valves restrict flow?

One, check valves are prone to jamming in the open position, thereby becoming an uncheck valve of sorts. Two, they are prone to jamming in the closed position, preventing water flow in any direction. And three, they can restrict water flow.

Why do check valves fail?

Check valve failure modes associated with wear or poor maintenance can include problems related to noise and vibration from water hammer, reverse flow, leakage or damage. Sticking valves can occur when material like scale or debris is trapped between the valve body and the moving parts such as the disc or ball.

What does a bad check valve sound like?

For example, check valves that are starting to fail will vibrate or make a noise indicating that the valve has broken. A strange noise can also be a sign of ‘water hammer’ which is a high-pressure surge that occurs when the fluid comes to a stop or changes direction, often causing the disc to slam into the valve.

How close should check valve be to 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.

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Where should a sump check valve be installed?

Sump pump check valves should be installed close to the floor after the pump, as shown by arrow #1. This will reduce the amount of water that drains back to the pump after each cycle.

What happens when a check valve goes bad?

A check valve is designed and installed into a line or pipe in such a way to allow the fluid to flow only one direction. When a check valve fails it allows the fluid o flow in either direction. This action may cause a pump to fail or the fluid to flow back through the pump when it is stopped stopped.

Which are the most serious defects in feed check valve?

Water hammer is one of the most common check valve problems. Water hammer is a pressure surge that’s caused when a liquid or gas is forced to stop or change direction suddenly, and often occurs when a valve is suddenly closed at the end of a pipeline system.

Will a check valve stop water hammer?

Studies and research at major hydraulics research institutions have shown that silent check valves, will, in fact, significantly reduce water hammer by reducing the severity of the pressure spikes.

What does valve chatter sound like?

So, If a valve spring has broken or a camshaft lobe is worn down; it will cause the engine to create a tapping or clicking sound, due to the excess clearance. Valve train noise, is similar to a clicking sound of a, sewing machine. The sound frequency of the valve train noise is, one-half the crankshaft speed.

Does check valve increase water pressure?

No. A check valve prevents backflow. A pressure reducing valve can regulate water pressure.

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.

Can a check valve be submerged?

Will the valve be installed in a submerged condition? If the valve is installed in a submerged condition, this means that there will always be back pressure on the valve.

Why does my sump pump make a loud banging noise?

The loud banging noise you hear when the sump pump turns on or off is caused by the check valve. … This in turn shuts the check valve, preventing it from flowing back into the pump. The loud banging noise is caused by the sudden change in pressure inside the pump and its hoses.

Why is my sump pump making a loud noise?

One of the most common causes of a noisy pumping system is that the sump pump system is not actually placed within the sump pit. If the system is not correctly placed, underneath the ground, then the noise will more than likely echo around your basement.

What does a check valve on a sump pump do?

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.

Is a check valve part of a sump pump?

Sump pump check valves are an important part of any sump pump system. Installed in the discharge pipe leaving your sump pump, the sump check valve prevents your pump from having to re-pump water it has already discharged.

When should a check valve be replaced?

Look for signs of corrosion, rust or mineral build-up. Replace the valve if there are extensive leaks or worn/broken pieces. Open & close the valves to make sure they aren’t seizing. Inspect pressure & temperature of fluid flowing through.

Does an electric fuel pump have a check valve?

Electric Fuel Pump – How Do They Work: Fuel is drawn into the pump, through an inlet tube and filter system. The fuel then exits the pump, through a one-way check valve; (which maintains residual pressure in the system when the pump is not running).

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

Check valves are used in a wide variety of equipment, cars, planes, pneumatic and fluid systems, while backflow preventers are typically used in plumbing systems for structures. A check valve has a variety of roles but is mostly used to regulate and control the flow of fluids, especially into pumps.

How do you unclog a check valve?

Step 1: Use the two wrenches and carefully unscrew the check valve, being careful not to lose the spring and ball valve on the inside. Step 2: Rinse or wipe in order to clear any debris from the inside of the check valve. Pay particular attention to the ball or where the ball has contact inside the check valve.

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.

How far should a sump pump check valve be installed?

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).

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.

Can swing check valves be mounted vertically?

We hear many people ask, “Can swing check valves be installed vertically?” The simple answer to that question is yes, swing check valves can be installed in both directions.

Do sump pumps need backflow preventer?

Traditional water powered backup sump pumps, located down in the sump pit, have discharge pipes filled with dirty sump water. … To guard against this, plumbing authorities generally require that homes with traditional water powered sump pumps install a Reduced Pressure Zone (RPZ) backflow preventer.