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At iSpring, we look beyond technology to make high-quality drinking water accessible for all households. We provide our customers with professional water solutions to any water concerns you may have. The FC15B carbon block filters are made of high-quality coconut shell carbon and are specially designed to remove up to 99% of chlorine from water as well as various other contaminants that cause unpleasant odors and tastes. Our FC15B CTO Carbon Block filters have a filtration capacity of up to 50,000 gallons of water, enough to supply a family of four with clean water for around 6 months. Save on your water bill - the filters won’t produce any wastewater. Official 2nd stage replacement filter cartridge for iSpring Under Sink Water Filter US21B and Whole House Water Filtration System WGB21B; 1st stage replacement filter cartridge for WGB21BM and WGB21B-PB. Fits standard 10” x 4.5” filter housings. Unlike an RO membrane, the CTO filters don’t reduce Total Dissolved Solids (TDS). They keep healthy minerals in your water instead. If you are interested in a filter that removes TDS, consider our iSpring Reverse Osmosis (RO) systems such as RCC7 series and tankless RO systems like RO500. Used as the second stage for iSpring Direct Connect under sink water filter system US21B and iSpring whole house filtration system WGB21B or the first stage of iSpring whole house filtration systems WGB21BM and WGB21B-PB. The carbon block filter consists of high-quality activated carbon. It is effective in reducing free chlorine, bad taste, odor, THM, organics, hazardous chemicals, and more. Depending on source water quality or flow rate, it needs to be replaced every 6 months or about 50, 000 gallons of water. Each filter is individually sealed to keep freshness. Fits models using standard 10" x 4.5" water filters.


