Foot valve Thai people often call the skull valve. It is the bottom valve used to suck water from below the pump. By supplying water to the pump, there must be a casting or mule. When the water goes into the pump, it also flows into the pipe. This valve prevents water from flowing into the well. The water in the pipe and at the pump will draw up the water in the well when the pump is powered on. One side of this type of valve has a thread.

Foot valve The foot valve serves as a filter, blocking water from flowing completely backward from the pump into the well or the water tank, stopping the pump from using again.