SEAFLO 12-Volt General Purpose 5.5 GPM Automatic-Demand Utility Pump. This general purpose pump can be used for a wide variety of applications. It is designed for Agricultural Spraying, Transferring Liquid Fertilizers, Herbicides, or Pesticides, Fluid Transfer, RV Water Supply, Boat Water Supply, Salt Water Washdown, Remote Cabin Water Supply, Industrial Applications, Draining Water Heaters, Draining Aquariums, Pumping Out Basements, Suctioning Water From Rivers or Streams, Transferring Water to an RV, Pumping Out Stock Tanks or other Liquid Transfer Applications. The built-in pressure switch turns the pump on-and-off automatically. If you install a valve, or hose on the outlet side, when you open the valve the pump automatically turns on. When you close the valve the pump will automatically turn off. This is a diaphragm pump, which makes it superior to an impeller pump because there is no impeller to wear out or fail. Also this greatly improves the pumps ability to reach higher pressure levels. This pump is Self-Priming, run-dry safe, and has very quiet operation and low power draw. The inlet and outlet ports are 1/2 in. threaded male fittings. The pump also comes with an intake strainer, and two 1/2 in. barbed fittings. This pump has a built-in check valve which prevents backflow and allows for city water connection if being used in an RV water supply application. This pump is NOT submersible. Intermittent duty. It comes with a 4-Year Warranty.