... /2HP, 110V, 20 GPM, 4" CE list Submersible Pump, Deep Well, 1/2HP, 110V, 20 GPM, 4" Features & Technical Specifications ... :4" deep well submersible pump, 115V, 6.5 Amps, Heavy duty high flow ... cord1¼” NPT dischargeDesigned to fit inside 4" ID or larger pipe/well casingHeavy-duty thermoplastic impellers, diffusers, and intake screen.High efficiency ...