Jabsco 50880 Series Marine Filter-Less Shower Drain/Bilge Pump, 3.7 GPM, 3/4 inch Connections Robust single diaphragm design sink & shower drain pump Flow rate: Nominal 16 Litres/min (4.2 US gallons/min), Self-priming from dry up to 3m (10ft) No filter required Compact and simple design, flexible installation Dry running capability