Adjustable Pressure Function: A pressure switch with a 40-60 psi pressure setting range activates an electrically driven water pump within a power circuit when the adjustable rising and falling thresholds are reached. Wide Application: 1/4″ inch Female NPT, standard water well pump replacement switch designed for use of electrically driven water well pumps of all types (Jets, Submersible, Reciprocating, etc). Easy to Use: The water pressure control is easy to use, stable in performance, protects the motor, saves power, and can be used for a long time.