Enjoy cleaner, clearer, better tasting water throughout your home with the Pentair OMNIFilter TO8-20 replacement cartridge. This heavy duty whole house filter reduces chlorine taste and odor along with sand, dirt, sediment and rust particles, so the water at every tap looks and tastes fresher. The TO8-20 is built around a bed of granular activated carbon held in a unique radial flow design. Radial flow gives you a high flow rate with low pressure drop and helps reduce the carbon fines often released by loose granular carbon filters. A 70 micron porous polyethylene outer shell and spun polypropylene core keep the carbon bed firmly in place. This 20 inch by 4.5 inch heavy duty big blue cartridge is rated for 100,000 gallons, making it a long lasting choice for higher demand homes. The TO8-20 pairs best with the Pentair OMNIFilter PF55 heavy duty housing and also fits 20 inch by 4.5 inch heavy duty housings from other major brands, so it can replace most granular carbon cartridges of the same size. Replace the cartridge whenever you notice reduced water pressure or a change in water taste, odor or quality.