The Doulton Ultracarb has been made of ceramic with an incorporation of silver locked within the ceramic structure. It has an inner core of activated carbon and contains media to filter heavy metals such as lead. The filters are 100 % natural and do not add any substances to the water.
Protect against the damaging effects of hard water by using the Doulton CleanSoft limescale reduction cartridge in the first chamber of the DUO drinking water filter. This will reduce temporary hardness in drinking water, reduce limescale build up in kettles and prevent an unpleasant film forming on the surface of tea.