Big blue 20-inch gac filter

The big blue 20" gac filter can be used to replace a current filter or upgrade from the standard carbon block filter. the filter measures 4.5-inch in diameter and 20-inch long and fits all standard 20-inch big blue housings. product features gac granular activated carbon for removal of chloramine, tastes, odors, and chemicals big blue 20" filter measures 20-inch long and 4.5-inch in diameter. standard big blue size fits in all standard 20" big blue filter housings. product description replacement gac filter fits standard 20" big blue filter housings. used in conjuntion with a sediment filter and/or carbon block filter, the system will provide a wide range of treatment. typical life expectancy varies greatly depending on water parameters and useage. recommended replacement is at least once a year, with every six months typical.