Doulton Ceramic Filter Elements have been trusted by relief organizations around the globe for over 150 years. These filters were developed in 1850 to remove disease causing bacteria from London's Thames River.These cleanable filter elements are designed to remove suspended solids, pathogenic bacteria, and chemical contaminants. In addition they will improve taste and reduce trace contaminants. These filter elements have been tested in accordance with NSF protocols for cyst, turbuyity, particulates, and chlorine reduction (Class 1).The cartridges are based on a Sterasyl ceramic pre-filter shell. The ceramic contains a specially formulated self-sterilizing silver compound therefore, the SuperCarb element does not require sterilization after cleaning. Inside the ceramic shell is a post-filter which is manufactured by combining a zeolite metal ion reduction medium, granular carbon, and powdered to form a tightly packed matrix. This 1 micron absolute rated carbon block core is effective for chlorine, taste & odor removal. The cartridge is open on both ends and fits in standard 10" filter housings.Maximum working pressure125 psi (8.6 bars)Maximum working temperature100 °F (37.8 °C)Minimum working temperature40 °F (4.4 °C)Recommended cleaning frequencyevery 6 months or when flow rate is noticeably lowerRecommended change frequencyevery 12 monthsContaminant RemovalThe great majority of pathogenic (disease causing) bacteria and cysts are larger than one µ. The pore size of the ceramic filter element is controlled so that it will remove all suspended matter larger than 0.9 µ.Pathogenic BacteriaChorela, Typhoid, Salmonella, Serratia, E. Coli, Fecal Coliform: >99.99% removalCystsCryptosporidium parvum and Giardia lamblia: 100% removal (based on tests by Arizona State University)SedimentDown to 0.9 µ, 100%; 0.5-0.8 µ with a filter efficiency of >99.99% (based on tests by Spectrum Laboratories, Minneapolis, MN)  Some restrictions apply to the sale of ceramic filters in the states of CA, WI, MA & IA. Call for details. doulton, supercarb, sterasyl, bacteriostatic, sterilizing, sterilization, ceramic cartidge, ceramic filter