A.Y. McDonald 21075V3 Bronze Well Pump Motor & Control Box 7 GPM 0.75 HP 230V 3-Wire Single-PhaseA. Y. McDonald offers a full line of four inch submersible ranging from 1 3 through 5 horsepower, with flow rates ranging from 5 to 25 GPM. Our 2100 submersibles offer peak capacity performance in 5, 7, 10, 15, 20 and 25 GPM models. All V Series No Lead Pumps come with a 1 1 4" discharge and sizes range from 1 3 to 2 horsepower (HP). Two wire models up to 1 1 2 horsepower (HP) or three wire models up to 2 horsepower (HP). A. Y. McDonald 21000 Series