You can choose from our various Hayward Multiport Valves. Most Vari-Flo Control Valve's functions include FILTER - For normal filtering and regular vacuuming; BACKWASH - For cleaning filter sand bed of accumulated debris;RINSE - For use after completing backwash cycle to ensure all dirty water is rinsed out of the filter to waste;WASTE - By-passes the filter for draining or lowering pool water level and for vacuuming heavy debris directly to waste line; RECIRCULATE - Water is recirculated through the valve, by-passing the filter.CLOSED - Shuts off the flow from the pump to the filter.