A.Y. McDonald offers a full line of four-inch submersibles ranging from 1/3 through 10 horsepower, with flow rates ranging from 5 through 90 GPM. The 23000 Series stainless steel submersibles offer peak capacity performance in 5, 7, 10, 15, 20, and 25 GPM models. All four inch submersibles are supplied with grounded leads meeting the National Electrical Code (N.E.C.) specifications. Powered by NEMA approved stainless steel motors.