Granular activated carbon (GAC) is commonly used for removing organic constituents and residual disinfectants in water supplies. This not only improves taste and minimizes health hazards; it protects other water treatment units such as reverse osmosis membranes and ion exchange resins from possible damage due to oxidation or organic fouling. Activated carbon is a favored water treatment technique because of its multi-functional nature and the fact that it adds nothing detrimental to the treated water. 
Aquachem Active Carbon Filters operate fully automatically without human intervention. The Active Carbon Filter performs automatic back-washing process for 15-20 minutes a day to renew itself in this way.