Product Features:
Turnover: 57,600 to 72,000 gals. 
Required DE : 7 lbs
Combination Pressure and Cleaning-Cycle-Indicator Gauge gives visual indication when cartridge filter elements need cleaning.
Manual Air Relief provides an easy way to manually purge air from filter.
Screen less Internal Air Relief continuously vents and eliminates clogging
Improved High-Strength FilterTank molded from new and stronger
PermaGlass XL material for dependable, corrosion-free performance.
High-Impact Grid Elements designed for up-flow filtration and top-down backwashing for maximum efficiency.
Self-Aligned TankTop and Bottom make access to servicing grid elements fast and simple.
Heavy-Duty, Tamper-Proof One-Piece Clamp securely fastens tank top and bottom together and allows quick access to all internal components without disturbing piping or connections.
Marked Short Element and Manifold provide clear guidelines for re-assembly of grid elements during cleaning.
Inlet Diffuser Elbow distributes flow of incoming water evenly to all filter elements.
Noryl' Bulkhead Fittings for extra strength and heat resistance.
Full-Size lWI Integral Drain provides fast, 100% clean-out and easier flushing. 
Union Locknuts make disassembly/reassembly of filter from piping fast and easy. - Plumbing Versatility means a wide variety of valve options for customized control of your filtration system, including Hayward's 2': 2-position slide valve