The Foot Valve is a kind of energy saving valve, which is generally installed at the bottom end of the underwater suction pipe of the pump, which limits the liquid in the pump pipe to return to the water source and plays the function of only entering and leaving. There are many inlet and reinforcement bars on the bonnet, which is not easily blocked, and is mainly used in the pumping pipeline. the role of waterways and supports. Caliber with single, double, multi-valve, flange connection and thread connection. Other names: internal thread lift bottom valve-well bottom valve, suction valve, filter valve, lotus head; lift bottom valve-flange bottom valve; rotary bottom valve-flange rotary bottom valve.