BLACK+DECKER 900 Series Cartridge Filter for Above Ground Swimming PoolsBLACK+DECKER Cartridge Filters are designed with power, precision and performance to give you clean water for a healthy pool. Features: 1 Piece ABS Spin off Lid and Locking Ring Finest Quality Cartridge Material Extra Capacity Cartridge with Fiber Mesh Reinforced End Caps Holds More Dirt, Creating Longer Filter Cycles and Less Servicing Isolation Gate Valves Built in Auto Actuated Check Valve Top Mounted Easy to Read Pressure Gauge Compatible With