) 1-1/4, Flow Ranges (GPM) 3 - 15.0, 1 Phase, Stages 8, GPM @ Vertical Depth to Water @ 20 Ft @ 30 PSI 13, GPM @ Vertical Depth to Water @ 100 Ft @ 30 PSI 10, GPM @ Vertical Depth to Water @ 20 Ft @ 50 PSI 12, 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.