Shurflo 4008-171 RV 115V On-Demand Potable Water Supply Pump KitThe Shurflo Revolution fresh water pump design was created with a unique one-piece diaphragm and internal by-pass, assuring long life and top performance in all plumbing systems. The quality reputation of Shurflo is built on the reliability and dependability of every pump they build. The Revolution fresh water automatic demand pump is quiet, thermally protected and can run dry without damage. Mounts in any position.On-Demand: Turns on when pressure decreasesBackflow Preventer: An internal check valve prevents reverse flowMulti-Fixture: Designed to handle plumbing systems with multiple fixtures4-Chamber Diaphragm: Four independent pump chambers for a smooth, even flowStandard RV System: Mounts between the water tank and the distribution pipingOn-DemandAn on-demand pump moves water through the f resh water system. It should be installed between the water storage tank and the distribution pi