Kohler Clarity Water Filter

The Kohler Clarity is designed to filter microbiologically contaminated drinking water through a replaceable ceramic filter for a family of four, producing up to 40 liters of water per day with 12 liters of safe storage. On their webpage, the manufacturer claims that the filter reduces bacteria, protozoa, and cysts by 2 logs, however, testing at Tufts University determined a >5.2 log reduction of E. coli through the filters. This product does not treat chemical contamination.

Technical support is available from the instruction manual in English, French, and Spanish. Instructions are also available in a series of  videos and pictorial instructions are printed on the underside of the plastic lid as pictured below.

The filter has the capacity to treat 5,000 liters before it needs replacing. There is no end-of-life indicator so users are recommended to check the filter cartridge periodically for cracks, and to regularly clean it with sandpaper when flow is reduced. When cleaning with sandpaper does not restore flow due to irreversible fouling or there are cracks present in the cartridge, the filter cartridge needs to be replaced.

Biological testing done by Tufts University showed 5 log E. coli removal, and Biological Consulting Services found compliance with the USEPA P231 Protocol (Microbiological Water Purifiers) and additional Kohler-specified protocols for Salmonella, Shigella, parasites, and E. coli.

No known safety risks if used properly.