Rotary Gear Pump Head Heavy Duty With Relief Valve Port Size 1 In. Shaft Dia 0.750 In. Shaft Height 3 9/16 In. 20.6 GPM @ Freeflow 1 1/2 HP @ Free Flow Suction Lift 15.2 Ft. Pump RPM 1725 20.5 GPM @ 25 PSI 1 1/2 HP @ 25 PSI 3 HP @ 125 PSI Max Pressure 125 PSI Seal Mechanical With Stainless Steel Buna N Carbon/Ceramic Fortron PPS Spur Gear Warranty Length 1 Year