Johnson Pump 10-2445301, Macerator Pump. A rotary cutter shreds waste before it is pumped into or out from the holding tank. Features : ignition protected motor, mounting bracket for easy replacement, rotary cutter of PET ( thermoplastic polyester ), directly connected to sewage line or holding tank. Hose connection 1 1/2 inch inlet, 1 inch outlet. 10 GPM, 12 volts.