Flint & Walling Deep Well Submersible Pump, Number of Wires 2, Control Box Required No, 10 GPM, 1/2 HP, Voltage 230, Amps AC 5.0, 1 Phase, Stages 8, GPM @ Vertical Depth to Water @ 20 Ft @ 30 PSI 13, GPM @ Vertical Depth to Water @ 100 Ft @ 30 PSI 9, GPM @ Vertical Depth to Water @ 20 Ft @ 50 PSI 11, GPM @ Vertical Depth to Water @ 100 Ft @ 50 PSI 5, Built-In Check Valve Yes, Discharge Head Material Stainless Steel, Impeller Material Noryl, Discharge Port (In.) 1-1/4, Flow Ranges (GPM) 3 - 15