All Vari-Flo control valves feature an easy-to-use lever action handle that lets you "dial" up to seven valve/filter functions: filter, backwash, waste, rinse, closed, winter, or recirculate. Complete with an integral sight glass that lets you see when the backwashing cycle is completed, our wide selection of valve configuarations allows you to match the right Vari-Flo valve to the proper application.