Three filtration stages with a single Doulton cartridge 1st stage - Ceramic shell 2nd stage - Bonded carbon 3rd stage - Ion exchange medium NSF certified standard 42 & 53 Filtration efficiency of >99.99% at 0.9 microns Filtration efficiency of >99.9% at 0.4 microns Tested with live Cryptosporidium to a removal of >99.999% 97% chlorine reduction Lead reduction @150 PPB 98.3% Capacity is 600 US gallons
			Ultracarb Cartridges The Doulton Ultracarb is a three stage cartridge combining the highly efficient filtration properties of ceramic with the enhanced water treatment properties of activated carbon and the heavy metal reduction capabilities of ion exchange media. First Stage  The first stage consists of Doulton Sterasyl ceramic which provides genuine sub micron filtration.  The cartridge reduces fine particulate matter, bacteria, cysts and turbidity.  The incorporation of silver locked within the ceramic structure gives enhanced bacteriostatic and self sterilizing properties. Second Stage  An inner core of activated carbon block removes chlorine and organic compounds. Third Stage  Ion exchange resin reduces heavy metals like mercury and lead