Whole House Pleated Polyester Filter Cartridge, 20" X 2.5", 30 Micron, Pentair Pentair Pentek EP Series Carbon Block Cartridges are manufactured using a process that a cartridge with a nominal 5- filtration rating and high holding capacity. A high porosity design helps the cartridge from plugging before its adsorption capacity is exhausted, maximizing the utilization of the carbon while maintaining low pressure drop. These cartridges are protected by a uniquely formulated bilaminate pre-filter, designed to significantly increase the useful life of the cartridge by trapping sediment that typically plugs carbon block cartridges. EP Series Cartridges make an ideal choice for a wide range of residential, food service, commercial and industrial applications. KEEP YOUR WATER CLEAN and protect your appliances by removing dirt, sand, silt and particulates FITS ALL 20" Housing and can replace any 20" x 2.5" sediment filter PLEATED MEDIA maximizes dirt holding capacity and extends the time period between changes or cleaning DURABLE, NON-WOVEN AND REUSABLE POLYESTER FABRIC that is suitable for a wide range of filtration uses REUSABLE TO EXTEND CARTRIDGE LIFE