What is the purpose of a foot valve on a pump?

The purpose of a foot valve on a pump is primarily to keep the pump primed. A foot valve is a type of one-way valve installed at the inlet of a pump, typically submerged in the water source. Its design allows water to flow into the pump while preventing it from flowing back out when the pump is turned off or when the suction pressure drops.

By maintaining the water column in the suction line, the foot valve ensures that the pump does not lose its prime, which is crucial for maintaining consistent operation. If the pump loses its prime, it will not be able to draw water effectively, which can lead to pump failure and inefficient performance. Therefore, having a properly functioning foot valve is essential for the reliable operation of a pump in water distribution systems.