A.Y. McDonald 22050K3ALB Thermoplastic Well Pump & Motor 10 GPM 0.5 HP 115V 3-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). The 2200 submersibles offer peak capacity performance in 5, 7, 10, 15, 20 and 25 GPM models. Other features include thermoplastic discharge head with built in check valve and stainless steel shaft and coupling. All K Series Thermoplastic pumps have a 1 1 4" discharge with