This Pentek RFC20-BB carbon filter cartridge reduces chlorine taste and odor in residential and commercial drinking water. It is made of granular activated carbon (GAC) media with a spun polypropylene core and polypropylene end caps for strength, and there is a nitrile butadiene rubber (Buna-N) gasket to ensure a watertight seal. The filter has a porous polyethylene 70-micron outer shell to reduce carbon fines and other suspended particles in the filtered water. It will reduce free available chlorine (FAC) at 2 parts per million (ppm) by at least 75% in up to 70,000 gallons at a flow rate of 4 gallons per minute (gpm). The filter has an initial pressure drop of 0.90 pounds per square inch (psi) at a recommended flow rate of 4 gpm, and operates over a temperature range of 40 to 125 degrees F (4.4 to 51.7 degrees C). This carbon filter cartridge is used for treatment of residential and commercial drinking water.