The Home Depot Carbon Post Filter Replacement cartridge for HD-RO 4000, Reverse Osmosis Drinking Water System 105004 0958154
Shop for Water Dispensers & Filters at The Home Depot. This 13 in. replacement granular activated carbon (GAC) filter for a reverse osmosis filtration system removes impurities, chemicals and contaminants from water through absorption and a process called catalytic reduction. Volatile organic contaminants (VOC's) are removed by absorption, whereas residual disinfectants such as chlorine and chloramines are removed by catalytic reduction.