Designed for vertical grid D.E. filters with up to 80 square feet of filtration area, Hayward D.E. separation tanks are ideal for water conservation and savings during backwashing by returning chemically treated backwash water to the pool. Molded of rugged reinforced thermoplastic Hayward D.E. separation tanks hold up to 10 lbs. of used D.E. filter powder and compliment both new and existing vertical grid D.E. filter installations.