Pump, Model 854099 NDP-20 Series, Air Operated Double Diaphragm Pump, Hytrel
7 GPM Max Flow, 3/4" NPT Fluid Port, 3/8" Female NPT (includes ball valve) Air Inlet, 3/4" Female NPT (includes silencer) Air Exhaust, Aluminum Air Motor, 18 Feet Max Suction Lift.Yamada Pumps NDP-20BPH-PP Diaphragm, Hytrel / Buna-N Flat Check Valve / O-Rings, Polypropylene (PPG) - Non-Metallic Center Body Material, 31.