The Shurflo Macerator Pump has been specifically designed for sanitation waste and fish box evacuations. It features a run-dry capability and a seamless shell motor with o-ring-sealed end bells and a sealed manual turn key to deliver durability and quality performance for years in marine environments. It also has a solid housing construction and unique dual, stainless steel serrated blades that ensure problem-free pumping. This 12VDC pump is self-priming up to 3' in lift. It has a 1.5" inlet barb and a 1" outlet barb for easy and direct installation. For your safety it is thermally protected and ignition protected.