Doulton Ceramic Replacement Filter for Undercounter CWR Water Filter Systems Use this Doulton Ceramic Replacement Water Filter RF-UC for the CWR HCP Doulton Countertop Water Filter Not Included, Requires No Plumbing ,the CWR-HCS Doulton Water Filter System not included and the CWR HIS Under Counter Water Filter with Stainless Steel Housing not included, Plumbing Required . If you want better tasting, safer water using a passive water filtration system, you need a water purifier unit that uses a Doulton ceramic filter. The Doulton Ceramic filter is one of the most effective water filters for passive water filtration systems. Each water filter is constructed with ultra-fine ceramic with a filtration efficiency of 0.9 microns absolute. Independent testing shows that Doulton ceramic filters are more effective at reducing cryptosporidium than conventional block carbon filters tested under similar conditions. Also Doulton filters have a high efficiency rating in reducing giardia 99.95%reduction , lead and chlorine. Lead and chlorine are also significantly reduced, as a result, providing safe, better tasting water for your family and pets. RF-UC Ceramic Filter with High Density Activated Carbon Facts NSF certified for standards 42 53 chlorine, parasite, lead, turbidity, bad taste and odor reduction Manufactured in accordance with the highest international manufacturing standards. ISO99002 and BS5750 Doulton's 0.9 micron absolute filtration efficiency exceeds the EPA requirement for Cryptosporidium parasite reduction. Filter can be cleaned with a brush to remove rust, dirt, etc. and rinsed with clean water to increase the life span. RF-UC Ceramic Filter Reduction Levels Chlorine 97.2% Taste Odor 99% Lead 97% Particulates 0.8 99.98% Bacteria B.subtilis 99.99% Rust-Dirt-Sediment 99% Turbidity suspended foreign particles, i.e. muddiness 99.69% Parasite Giardia and Cryptosporidium 99.99% RF-UC Ceramic Filter with High Density Activated Carbon This item ships from a separate warehouse and may require extra time for delivery.