Square D FSG2J24M4CP Pumptrol Water Pump Pressure Switch, 40-60 Psi40 PSI to 60 PSI pressure setting range activates an electrically driven water pump within a power circuit when the adjustable rising & falling thresholds are reached. Highlights: 40 60 PSI Low pressure cut off at 40 PSI 1 4 NPSF internal thread opening For control of electrically driven water pumps Adjustable cut in out For commercial & industrial pumping applications Adjustable differential range is 15 PSI to 30 PSI cut out range is 20 PSI to 65 PSI