4" submersible deep well pump. Ideal for use in 4" I.D. or larger wells from depths of 100 feet. Powered by 2-wire, Franklin Electric motor. Hex rubber bearing with extra large surface assures shaft stability and multiple flow channels keep small particles such as sand away from bearing surfaces. Built-in check valve prevents backflow and ensures system pressure. Built-in suction screen and 1-1/4" NPT thermoplastic discharge head helps to prevent debris from clogging impellers and provides full flow performance without risk of corrosion.