This SHURflo Industrial on-demand positive displacement, 3 chamber diaphragm pump has a permanent magnet, thermally protected 115V AC motor that delivers reliable performance in high-flow, moderate pressure applications. Self-priming up to 9 ft. vertical. Max. 50 PSI; max. 30 PSI inlet pressure. Discharge Port (in.): 1/2, Self-Priming: Yes, Thermal Overload Protection: Yes, Suction Port (in.): 1/2, Max. Total Head (ft.): 100, Flow (GPH): 198, Max. PSI: 50, Volts: 115