Doulton Open End Ceramic Replacement Filter for HCS, HIS and HCP Models This Doulton Open End Ceramic Replacement Filter OBE Open both ends is a replacement ceramic candle for these Doulton Ceramic water filters systems HCP-Doulton Ceramic Counter Top, HCS, Stainless Steel Ceramic Counter Top and HIS-Stainless Steel under Counter Ceramic systems. None of the systems are included this is a filter only. Doulton Ceramic Filter with High Density Activated Carbon NSF certified for standards 42 53 chlorine, parasite, lead, turbidity or cloudiness, 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 Doulton Ceramic Filter Product Specifications Recommended Cleaning Frequency Every 3 months or when water flow rate is noticeably lower Maximum Working Pressure 125 psig 8.6 bar Recommended Change Frequency 12 months or 1,000 gallons, whichever is sooner 4,542 liters Working Temperature 40 100 degreesF 4 38 degreesC This item ships from a separate warehouse and may require extra time for delivery.