Pressure Switch Air Compressor and Water Pump Manual Switch Action None (1) Port 1/4 in FNPS Pressure Switch Factory On/Off Setting 40/60 psi No Pressure Switch Unloader Pressure Switch Differential 15 to 30 psi Pressure Switch Range 5 to 80 psi Pressure Switch Electrical Contact Form DPST Pressure Switch Action Standard NEMA Rating 1 Series 9013GSG HP @ 1 Phase - 120V 2 hp HP @ 1 Phase - 240V 3 hp HP @ 3 Phase - 240V 5 hp HP @ 3 Phase - 480V 5 hp