Doulton Ceramic Drinking Water Filters http://doultonusa.com Doulton USA Ceramic Water Filters Filters you can trust - Ceramic filter elements manufactured in the UK under ISO conditions to meet NSF requirements. High flow - Filter offers a superior flow rate of up to 520 gallons (2000 litres) per hour at 45 PSI (3 bars). Excellent water flow in low water pressure areas. 0.9 microns absolute filtration rating as defined greater 99.99% efficiency. Most efficient system for cysts removal compare to any available alternative technologies such as chlorine, ozone, UV, RO etc.. Tested with live Cryptosporidium by University of Arizona in USA and Water Research Council (WRc) in Europe. http://doultonusa.com/doulton_water_filters/Whole-house-ceramic-water-filter.php Wed, 09 May 2007 13:00:00 GMT http://doultonusa.com/doulton_water_filters/Whole-house-ceramic-water-filter.php