Product details:

Features: Durable, flanged inspection cover provides convenient access to top of filter. Top diffuser ensures even distribution of water over the top of the sand media bed. Automatic air relief purges any trapped air during operation of the filter system. Unitized, corrosion-proof filter tank molded of rugged, colorfast polymer material for dependable, all weather performance. Large pressure sand/water drain for rapid winterizing or servicing. 6-position Hayward Vari-Flo control valve with easy-to-use lever action handle lets you dial any of the 6 valve/filter functions. Integral sight glass lets you see when backwash cycle is completed. Precision engineered umbrella-fol self cleaning laterals for balanced flow and backwashing, plus easy serviceability.