The Pentek CEP-10E Coconut Based Carbon Block Water Filter Cartridge reduces bad taste & odor and chlorine taste & odor reduction. The benefits of the Pentek CEP-10E replacement filter cartridge are low extractables and minimal pH rise for RO pre- and post-filter applications. This filter cartridge has enhanced dirt holding capacity and are manufactured from an acid-washed coconut-carbon based formulation that minimizes the pH rise and produces better tasting water. This water filters patented manufacturing process yields a cartridge with a nominal 5-micron filtration rating, low extractables, and a minimal pH rise ideal for RO pre- and post-filter applications. A thin-wall, high porosity design helps prevent the cartridge from plugging before its adsorption capacity is exhausted, maximizing the utilization of the carbon while maintaining low pressure drop.br The Pentek CEP-10E filter cartridges are protected by Endurawrap, a uniquely formulated polyolefin bilaminate prefilter, designed to significantly increase the useful life of the cartridge by trapping sediment that typically plugs carbon block cartridges.br NOTE: Do not use with water that is microbiologically unsafe or of unknown quality without adequate disinfection before or after the system.