Water Powered Sump Pump, Switch Actuation Vertical Float, Off Point 4.5 in, On Point 7.25 in, Flow Rate @ 5 Ft. of Head and 30 PSI 11.7 gpm, Flow Rate @ 5 Ft. of Head and 50 PSI 16.2 gpm, Flow Rate @ 10 Ft. of Head and 30 PSI 7.5 gpm, Flow Rate @ 10 Ft. of Head and 40 PSI 11.0 gpm, Flow Rate @ 10 Ft. of Head and 50 PSI 13.0 gpm, Flow Rate @ 15 Ft. of Head and 40 PSI 7.2 gpm, Flow Rate @ 15 Ft. of Head and 50 PSI 10.0 gpm, Flow Rate @ 20 Ft. of Head and 40 PSI 3.5 gpm