The Pentek CFB-Plus20BB is a coconut shell carbon block filter cartridge with a 0.5 micron nominal rating. This fine filtration level allows it to effectively reduce Cryptosporidium and Giardia cysts, lead, VOCs, chlorine taste and odor, and fine sediment, making it ideal for whole-house or point-of-entry filtration systems requiring high-performance contaminant reduction.

The Pentek CFB-Plus20BB has a service life of approximately 20,000 gallons for chlorine taste and odor reduction, or around 6 months, whichever comes first. It supports a maximum flow rate of 6 GPM (gallons per minute) at a maximum operating temperature of 100°F (38°C), with an operating pressure range of 30–125 psi, making it suitable for high-demand big blue housings.

Yes, the Pentek CFB-Plus20BB is manufactured with components that meet NSF/ANSI Standard 42 for material safety and performance for chlorine taste and odor reduction. It is also tested to reduce lead, cysts (Cryptosporidium and Giardia), VOCs, and MTBE, aligning with NSF/ANSI 53 health-effects criteria for applicable contaminants.

The Pentek CFB-Plus20BB measures 20" x 4.5" (Big Blue size) and fits standard 20-inch Big Blue whole-house filter housings, including Pentek, Pentair, American Plumber, and other compatible 20" BB systems. Always confirm your housing's inner dimensions before installation to ensure a proper seal and optimal performance.

Before installation, shut off the water supply and depressurize the housing. Insert the CFB-Plus20BB into a clean 20" Big Blue housing, ensuring it is seated correctly on the bottom standpipe. After reassembly, slowly open the water supply and flush the filter for 5–10 minutes to remove any loose carbon fines before use. Replace every 6 months or 20,000 gallons for consistent filtration performance.