Hex Autoparts 12V 45LPM 12GPM Macerator Sanitation Waste Water Pump Toilet RV Marine Boat Grinds solid toilet waste into small particles for easier discharge either overboard, in the case of marine applications, or into holding tanks on RV's Shreds waste efficiently with high-speed rotary cutter Higher discharge capacity, empties a 30 gallon (115 Liter) holding tank in just 3 minutes Higher efficient duty circle, 15-minute duty cycle lets you empty 180-gallon tank in a single operation Self-priming to 5ft, lifts the waste solids and liquids up to the inlet of the pump