Water Pressure Diaphragm Pump 12V 4.3 L/min 1.2 Gpm 35 Psi - Caravan/RV/Boat/Marine On-Demand, Automatic Water Pump For Small Boats, Campers, And Vans Built-In 35 Psi Pressure Switch For Automatic Stop/Start Self-Priming--Allows It To Be Mounted Above Tank; Able To Run Dry Built-In Thermal Protector; 3/8-Inch Hose Barb Ports 1.2 Gallons Per Minute (4.2 Litres Per Minute)