Tier1 Replacement for C550 Hayward CX550RE, EasyClear C5500, Filbur FC-1245, Pleatco PA55, Unicel C-7455 Filter Cartridge AFFORDABLE REPLACEMENT: Replaces cartridges Unicel C-7455, Filbur FC-1245, Pleatco PA55, Hayward CX5500RE INCREDIBLY SIMPLE TO USE: Easily replaces the old filter cartridge with 55 Sq. ft. media EXTREMELY DURABLE: Measures 9 5/8 inches (length) x 7 inches (outside diameter); top and bottom hole 3 inch diameter with Open Molded Gasket FITS THE MODEL NUMBER: Hayward Easy Clear C550 100% TIER1 NO WORRIES GUARANTEE: We stand behind the quality of filtration and overall performance of our Tier1 filters! Replace your filter when the pressure gauge on your filter tank reaches 8 psi above the pressure recorded when first installed. Turn off the power to your pump and bleed the excess air pressure of the system using the air valve on the filter. Remove any band clamps and/or lids to your filter. Remove the cartridge from the filter canister and dislodge any loose debris Rinse the cartridge thoroughly with clean fresh water and return it to the filter tank. Secure the tank lid and any band clamps.