18590 SELF-PRIMING MACERATOR PUMP, with run dry protection. WASTE EVACUATION. This pump is the ideal solution for emptying holding tanks. Self priming to 5ft this pump will empty a typical 30GAL holding tank in less than 3min. use also for empty Fish box and livewell (self-priming & grinding properties). Stainless Steel Cutter reduces particle size to 1/8 3mm maxi. New 4 blades design. Ports: Inlet 1-1/2 38mm Hose Barb and 1-1/2 N.P.T. (Male). Outlet 1 inch 19mm Hose Barb. MODEL 18590-2092 Sealed Macerator 12V, Amp 16, Fuse Size 20Amp. 18590-2094 Sealed Macerator 24V, Amp 8 , Fuse Size 15Amp. Service Kit 18598-1000 (fiber washer, stud, 2 gasket, impeller 6303-0003, body & seal)