Master Plumber, 1 HP, 230V, 4 in. stainless steel submersible well pump. Economical, energy-efficient pumps for 4in. wells or larger. They provide the optimum amount of water and pressure for general home and farm use. 2 wire pump and requires no control box. This pump fits 4 in. inside diameter or larger wells, patented floating stack design for sand resistance and reduced sand locking, corrosion resistant stainless steel sump, and motor housing, 1-1/4 in. discharge connection, precision molded impellers and diffusers, includes built in check valve, no control box needed, 3 year warranty. Performance: GPM 20 ft. = 60 ft. = 14.7 in., 80 ft.= 14 in., 100 ft. = 13.4 in., 150 ft. = 11.7, 200 ft. = 9.7, 250 ft. = 7.3, 300 ft. = 4.4, 4 in.