Pentair 4000 Series D.E. Inground Pool Filter

Valve included. Unique Spiro-Mite curved grid design ensures an even flow and uniform distribution of D.E. for optimum filtration efficiency. Corrosion-resistant 20" diameter fiberglass filter tank is strong, durable and made to last for years. Exclusive clamp ring design is proven to be safe, strong, and reliable. It allows for quick and easy access to internal components. Durable backwash valve is unaffected by heat and cold, ensuring flawless operation under all conditions. 2" plumbing connections provide maximum flow. Maximum Operating Pressure 50 psi. Individually-removable grids for easy cleaning