18690 AC MACERATOR PUMP 115V AC 60HZ, is the ideal answer to waste handling problem. The macerator section grinds waste down to a particle size of 1/8 maxi so it can be pumped easily through a 1 inch hose discharge line. The pump is self-priming permitting the unit to be mounted above or below the tank in a convenient location. Empty a 30GAL tank in only 3 min. 18690-0000 waste pump will macerate & pump all waste and tissue normally found in marine waste systems. IT WILL NOT HANDLE HARD SOLID OBJECTS, SANITARY NAPKINSOR RAGS. Port Type Inlet 1-1/2 External Pipe Thread Outlet รป 1 inch ID Hose Barb. Service Kit 18598-1000 (fiber washer, stud, 2 gasket, impeller 6303-0003, body & seal)