A.Y. McDonald 22050V2 Thermoplastic Well Pump & Motor 7 GPM 0.5 HP 230V 2-Wire Single-PhaseA. Y. McDonald offers a full line of four inch submersibles ranging from 1 2 through 1 1 2 horsepower (HP), with flow rates ranging from 5 through 25 gallons per minute (GPM). Other features include thermoplastic discharge head with a built in check valve and stainless steel shaft coupling. All V Series Thermoplastic Pumps have a 1 1 4" discharge with internal check valve and sizes ranging from 1 2 to 1 1 2 horsepower (HP). Two or three wire models up