Eric, Like Charles Culotta, I recently installed a new SeaLand holding tank pump right on top of the holding tank (see attached pictures sent by email) If it should quit for any reason and I have a full tank, it makes for easy repair. I got tired of the macerator pump failing and wanted to be able to pump the holding tank dry. The SeaLand pump, is a T-Series, Waste Discharge Pump, Self-priming bellows # 317-301200, T12 Pump does a great job. Al Miller 37 Pacific Trawler "Pleasant Moment" Palm Coast, FL