CFS Radial Flow Carbon Filter, 20 x 4.5 in, Fits Pentek RFC20-BB

CFS radial-flow granular activated carbon cartridges in the 20 x 4.5 inch Big Blue size, sold in the pack sizes shown. Water flows from the outer wall through the carbon bed to the core, reducing chlorine taste and odor.

• Fits 20 x 4.5 inch housings: compatible with Pentek RFC20-BB and other standard 20 x 4.5 inch housings. This is a compatible replacement, not an original manufacturer part.
• Not an iron-reduction cartridge: this carbon cartridge is not designed or rated to reduce dissolved iron. For iron-related staining, select a cartridge or treatment system specified for iron reduction.
• Change when needed: replace when chlorine taste returns or pressure at the taps drops noticeably.
• Check the size: 10 inch cartridges are half as long and will not seal in a 20 inch sump, and 2.5 inch slim cartridges will not fit a Big Blue housing.