Controls the Well Pump: The pressure switch is the "brain" of the well system, responsible for automatically turning the well pump on and off based on the water pressure in the tank. When it does not work properly, water does not flow smoothly, and other components within the system will not operate at peak efficiency. It has a built-in diaphragm that moves back and forth reacting to the water system pressure. When you own. When you use water and the pressure drops low enough, a small electrical sensor called a pressure switch turns the pump on. This cycle happens dozens of times a day. On a healthy system, the pump runs for 1 to 2 minutes per cycle.
