Hayward Vari-Flo XL multiport control valve is made of Hayward’s exclusive PermaGlass XL™ material and engineered for maximum flow. The Vari-Flo control valves feature an easy-to-use lever action handle that lets you "dial" up to six valve/filter functions: filter, backwash, waste, rinse, closed or recirculate. Complete with an integral sight glass that lets you see when the backwashing cycle is completed.