Doulton W9330059 Under Sink Water Filter System – The DoultonW9330059 is an under sink in-line water filter system utilizing the Doulton ceramic Ultra Carb filter. It comes complete with an UltraCarb filter an acetal/polyester housing and mounting bracket. The Doulton Ultra Carb is a highly efficient ceramic micro filter which provides genuine sub micron filtration of water. The incorporation of silver locked within the ceramic structure inhibits the growth of bacteria and gives each cartridge enhanced bacteriostatic and self sterilizing properties. 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. It provides a high level of Chlorine and organics removal, along with Lead and other heavy metal reduction.