All DoultonŽ and British Berkefeld ceramic filter elements are manufactured with the highly consistent and controlled pore structure necessary to provide genuine sub micron filtration.

The table provides a summary of independently verified test data for Doulton and British Berkefeld filter elements and systems.

Mechanical Filtration Rating

Particulate Reduction

    >0.9 micron >99.99%

    >0.5 micron >99.9%

    Turbidity >99.7%

Cysts

    Cryptosporidium >99.99%

    Giardia Lambia >99.99%

Pathogenic Bacteria

    E. Coli >99.99%

    Vibrio Cholerae >99.99%

    Klebsiella Terrigena >99.99%

    Salmonella Typhi >99.999%

    Shigella >99.999%