Seaflo 12V WATER PRESSURE DIAPHRAGM PUMP 4.5GPM 17 L/MIN 40 PSI Caravan/RV/Boat/Marine On-demand, automatic water pump for boats, campers, and vans Built-in 40 PSI pressure switch for automatic stop/start Self-priming- allows it to be mounted above tank, able to run dry Built-in thermal protector; 1/2-inch Fittings 4.5 Gallons per minute (17 Litres per minute)