3/4 HP Water Well Submersible Pump. Eco-Flo EFSUB7-122 Submersible Well Pump Features 1 .25" FNPT Discharge Connection, Includes Built-In Check Valve, Provides Smooth Water Passes For Maximum Efficiency. Stainless Steel Pump Shaft Is Precision Ground For Exact Bearing Fit And Straightness. Precision Molded Impellers And Diffusers. Stainless Steel Pump Housing For Maximum Protection Against Corrosion. Stainless Steel Inlet Screen.