The Doulton W9223002 cartridge is open on both ends (OBE) and fits in standard 10"" filter housings, The Doulton W9223002 UltraCarb Filter features a Sterasyl ceramic outer shell and carbon block core with ATS resin, W9223002 cleanable filter elements are designed to remove suspended solids, pathogenic bacteria, hydrogen sulphide, and lead, In addition, they will improve taste and reduce trace contaminants, At the heart of every Doulton ceramic filter is the ""Sterasyl"" silver impregnated ceramic microfilter, The Doulton W9223002 features silver locked within the ceramic structure which inhibits the growth of bacteria and gives the ceramics self-sterilizing properties, Doulton ceramics do not remove the beneficial minerals from the water, ensuring the filtered water is enjoyable to drink and yet safe from harmful impurities, The Doulton UltraCarb Ceramic Filter is a self-sterilizing filter with submicron filtration at an economical cost!, The Doulton Ultra Carb W9223002 features ultra carbon, is silver impregnated, and has a carbon block + metallic media core, The W9223002 has four filtration stages within a single cartridge and is open at both ends, First Stage: The first stage consists of Doulton ultracarb ceramic which provides genuine sub micron filtration, The cartridge reduces fine particulate matter, bacteria, cysts and turbidity, Second stage: The incorporation of silver locked within the ceramic structure gives enhanced bacteriostatic and self sterilizing properties, Third Stage: An inner core of activated carbon block removes chlorine and organic compounds, Fourth Stage: Ion exchange resin reduces Lead and other heavy metals, The Ultracarb ceramic filter is designed to be used in pressure filters, Not for gravity filter use, The Doulton Ultra Carb W9223002 Ceramic Filter is certified by NSF and the WHO, Contaminant Reduction:, Pathogenic bacteria: Cholera, Typhoid, Salmonella, Serratia, E, Coli, Fecal Coliform >99, 99% removal, Cysts: Cryptosporidium Parvum, Giardia Lamblia >99, 99% removal, Sediment: Down to 0, 9 micron absolute; 0, 5 - 0, 8 micron with a filtration efficiency of >99, 99%, Organic Chemicals: Pesticides, herbicides and organic solvents removal, Metals: Lead, Iron, Aluminum removal, Taste & Color: Hydrogen Sulphide, Iron, etc, removal, Lead Removal: Lead is seldom found naturally in domestic water supply but can result from the dissolution of lead pipes which may still be in use in old water systems, The zeolite metal ion reduction medium in the Ultracarb element effectively reduces the lead content in drinking water, Specs:, Approximate Dimensions: 10"" (25, 4 cm) long X 2"" Diameter - short (3/4"") thread mount, Micron Rating (Nominal): , 9 µm, Maximum working temperature: 107° F, Minimum working temperature: 41° F, Capacity: 600 Gallons, Filter Media: Carbon Block, Certifications: NSF 42, NSF 53, Maximum working pressure: 125 psig, Recommended flow rate: 0, 3 - 0, 5 gpm, Recommended cleaning frequency: when flow rate is noticeably lower, Recommended change frequency: 6 months or 600 gallons, SKU: CWD3531