Tier1 Replacement for Pentair Clean & Clear Plus 320, Pleatco PCC80, Filbur FC-1976, Unicel C-7470 Pool Filter Cartridge AFFORDABLE REPLACEMENT: Replacement Clean and Clear Plus 320 filter for 80 Sq ft Pool systems that need 7 inch (Outside diameter) by 20 inch (Length) filters INCREDIBLY SIMPLE TO USE: Easily replace your old Pleatco PCC80-PAK4, Filbur FC-1976, and Pentair Clean and Clear plus 320 filters with the Tier1 Clean and Clear plus 320 pool filter. EXTREMELY DURABLE: Durable and Washable Pleated fabric that maintains strength even when loaded with sediment, our high flow core is designed to support the filter while providing industry leading flow rates while causing less wear and tear on your pump POOL FILTER CARTRIDGE REPLACEMENT: This Tier1 Clean and Clear plus 320 replacement filter can be used in place of your Pentair 320 filter 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.