World class ceramic water filters

Other Doulton system tests Live cysts test at University of Arizona US Live cysts test at Water Research Council (WRc) UK NSF standard 42 particulate US NSF standard 53 turbidity US NSF standard 53 lead US Serratia marcescens and escherichia coli bacteria test UK Salmonella typhi, shigella dysenteriae and vibrio cholerae Inaba bacteria test UK NSF standard 42 chlorine US Pesticides and herbicides test UK E.coli, heavy metals and THM's test Hong Kong

11.13 High Street Clare Suffolk CO10 8NY Telephone: Clare (0787) 277244

I.S.HORNSEY - B.Sc., Ph.D., C.Biol., M.I.Biol F.L.S., M.Inst Brewing

E. Coli Removal - Applicable to : DOULTON DRINKING WATER SYSTEM WITH Sterasyl, both; Slimline and Imperial series ceramic filters.

CERTIFICATE OF EFFICIENCY

THIS IS TO CERTIFY THAT FIVE DOULTON STERASYL 10" FILTER CANDLES, MANUACTURED BY FAIREY INDUSTRIAL CERAMICS LTD., WERE INSERTED INTO A NP5 FILTER HOLDER AND TESTED FOR BACTERIAL REMOVAL CAPACITY. WHEN INSERTED INTO THE HOLDER THESE CANDLES SHOWED GREATER THAN 99.99% REMOVAL CAPACITY.

THE CHALLENGE WATER WAS INOCULATED WITH 3.60 x 10(4) WASHED VIABLE CELLS OF ESCHERICHIA COLI, WHICH WAS PASSED THROUGH THE FILTER HOLDER AT A RATE OF 3OO LITRES/HOUR. TEST WAS PERFORMED ON 3 DECEMBER 1988.

original signed by

DR. I.S. HORNSEY

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