Note: 2 Wire Pumps Have A Total Of 3 Wires (2 Wires + Ground) Water Sentry Model RWS200, 1/2 HP, 115V, 2Wire, Deep Well Submersible Pump, 115 Volts, Amps, 10 GPM, 1¼" NPT Discharge, Designed To Fit Inside 4" ID Or Larger Pipe/Well Casing, CorrosionResistant Stainless Steel Motor Enclosure And Pump Shell, Stainless Steel Fasteners.