WHY MANUAL FLUSH:- The purpose of the flush system is to help prevent scaling or fouling of the RO membrane(s) by providing a rapid rinse which washes away impurities and keeps the membrane clean. It works with DC power supply so the wiring connection will be with booster pump wiring It works only at startup for 18 second and make your membrane filter clean Suitable for all type of water purifiers of any brand---- It significantly enhances the life of RO membranes and reduces membrane cleaning requirements The Manual flush valve noticeably increases the service life of the membranes in RO systems Standard RO system units are not normally fitted with flush valves, but these manual flash kits can be easily added