The foot valve / tusen valve functions as a bottom valve or basic valve in a water pump system and the like for an opening valve when the pump is turned on and closing when the pump is turned off. This type of valve is usually used in shallow wells or household water wells. The way the foot valve works is as a valve by opening and closing according to the condition of the pump being on or off, so that when the pump is turned off the water does not come out down the pipe because the valve is still stuck.
