A.Y. McDonald 241000R3YLS High Flow SS Pump & Motor 35 GPM 10 HP 460V 3-Wire 3-PhaseA. Y. McDonald offers a full line of four inch submersibles ranging from 1 through 10 horsepower (HP), with flow rates ranging from 35 through 80 gallons per minute (GPM). The 24000 high flow submersibles offer peak capacity performance in 35, 40, 55, 60 and 80 gallons per minute (GPM) models. All R Series submersible pumps are designed to pump within the 35 GPM range. Sizes are available from 1 to 10 horsepower. All models are standard with 2. 0" NPT