Master Plumber, 1/2 hp, 230V, 4 inch stainless steel submersible well pump, 2 wire, 10 gpm, for wells depths up to 150', patented floating stack design for sand resistance & reduced sand locking, corrosion resistant stainless steel pump & motor housing, 1-1/4 inch discharge connection, precision molded impellers & diffusers, includes built in check valve.