Macerator Waste Pump 24 volt. Flow rate to 12 GPM. Self-priming up to 4′. New four-bladed chopper reduces clogging. Detects the absence of fluid then shuts off pump before impeller is damaged. Sensor provides adequate run-dry period to allow initial priming of the pump. Inlet port: 1-1/2″ hose barb plus 1-1/2″ NPT inlet port. Discharge port: 1″ hose barb. Dimensions: 11-3/8″ L x 4-3/4″ W x 3-5/8″ H. Complies with USCG Regulation 183.410 and ISO 8846 MARINE.