Features Durable Tank Housing constructed of Dura-Glas Safe Posi-Lok Clamp 2" Plumbing and Rectangular Grid System provides Superior D.E. Filtration Low Maintenance Dual Drain PlugsSpecifications Filter Area: 37 sq. ft. Optimal Performance at this GPM: 56 Flow Rated at 1 - 2 GPM per sq. ft.: 37 - 74 Turover Rate (Gallons): 6 Hr: 13000 - 27000, 8 Hr: 18000 - 36000, 10 Hr: 22000 - 44000 Tank Port Size: 2"D.E. Required: 3.7 lbsWeight: 112 lb