... /2HP, 110V, 20 GPM, 4" Features & Technical Specifications:4" deep well submersible pump, 115V, 6.5 Amps, Heavy duty high flow: ... 20 GPM. That is greater than almost all other well pumps.Solid stainless steel body with heavy duty cast iron ... cord1¼” NPT dischargeDesigned to fit inside 4" ID or larger pipe/well casingHeavy-duty thermoplastic impellers, diffusers, and intake screen.High efficiency ...