Why there is a check valve on pump discharge?

When the pump shuts off, gravity wants the water that is in the discharge pipe to fall back into the pit. The check valve is there to prevent that from happening. The check valve prevents the pump from having to re-pump that water out which could result in short cycling.

Do pumps need check valve?

Check valves are used in many different applications. For example they are often placed on the outlet side of a pump, to protect the pump from backflow. Centrifugal pumps, the most common type of water pumps, are not self-priming, and therefore check valves are essential for keeping water in the pipes.

Should a bilge pump have a check valve?

Parts Needed. And no, you should not use a check valve in the bilge pump line to prevent the back flow of water. The use of a check valve is not recommended due to the potential for sticking and causing the pumping system to fail. Therefore, it’s a good idea to remove as much of that water as possible.

Is a check valve necessary on 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.

What is meant by check valve?

A check valve is a valve that is closed by the pressure of a fluid so that the fluid does not flow back in the direction it came from. Check valves ensure that fuel flows in only one direction, thus avoiding contamination.

What is a discharge check valve?

2. INTRODUCTION. An essential element in the design of water and wastewater pumping systems is the proper selection of the pump discharge check valve, whose purpose is to automatically open to allow forward flow and automatically return to the closed position to prevent reverse flow when the pump is not in operation.

Is a check valve a non-return valve?

Fundamentally, check valves (CVs) and non-return valves (NRVs) are different fittings and serve different purposes. The non-return valve, whilst useful for preventing reverse flow in pipes in many situations, is not a recognised backflow prevention device.

Can you run a sump pump without a check valve?

What Happens If A Sump Pump Check Valve Is Not In Place? Without a sump pump check valve in place, all the water in the discharge pipe empties back into the sump pump pit liner. Higher water levels in the sump pit liner causes the pump to run more often, increasing energy costs.