Reduce forever chemicals and enjoy cleaner, clearer, better tasting water with the Pentair OMNIFilter CBF3 Water Filtration System. This premium single-stage under-sink drinking water system uses an OMNIFilter CB3 0.5 micron carbon block cartridge to reduce PFOA and PFOS forever chemicals, lead, chlorine taste and odor, and Giardia and Cryptosporidium cysts, helping protect your family while improving the taste of water you use for drinking, cooking, ice and beverages. The complete system includes the filter housing, the CB3 carbon block cartridge, a chrome drinking water faucet, 1/4 inch tubing, a housing wrench and mounting screws. Quick-connect fittings make it straightforward to connect the system to your under-sink cold water line, and the dedicated faucet keeps filtered water separate and ready on demand. The CB3 carbon block is NSF/ANSI 42/53 certified for lead, chlorine taste and odor, Giardia and Cryptosporidium cysts, and is certified by IAPMO R and T against NSF/ANSI Standard 53 for the reduction of PFOA and PFOS. The 0.5 micron CB3 cartridge filters about 400 gallons of water. Replace it with a genuine OMNIFilter CB3 cartridge when you notice a drop in water flow or water quality. The CB3 cartridge also fits OMNIFilter CBF1, OT32 and USM2 under-sink housings.