The Pentek C1 features a 5-micron nominal carbon block filter, which effectively reduces chlorine taste and odor, sediment, and fine particulates from your drinking water. This tight micron rating makes the C1 ideal for polishing municipal tap water at the point of use, delivering cleaner, better-tasting water directly from your under sink system.

The Pentek C1 is rated for 1,000 gallons of filtered water or approximately 6 months of use, whichever comes first. Actual lifespan may vary based on your incoming water quality and daily usage. For best performance and taste, Pentek recommends replacing the C1 cartridge every 6 months to prevent pressure drop and maintain chlorine reduction efficiency.

Yes, the Pentek C1 is tested and certified to NSF/ANSI Standard 42 for chlorine taste and odor reduction, and Standard 61 for material safety. The activated carbon block media in the C1 is specifically engineered to reduce chlorine, bad tastes, unpleasant odors, and sediment, making it a reliable choice for improving the quality of municipal drinking water.

The Pentek C1 is a standard 9-3/4" x 2-7/8" cartridge designed to fit most standard-size 10-inch under sink filter housings, including Pentek Slim Line 10 housings and other compatible 10" systems. Its universal sizing makes the C1 a convenient drop-in replacement for many point-of-use and point-of-entry filtration setups that use a standard 10-inch cartridge format.

To install the Pentek C1, shut off the water supply and relieve system pressure, then unscrew the filter housing and replace the old cartridge with the new C1, ensuring the O-ring is properly seated. After reassembling, slowly turn the water back on and flush the system by running cold water for 5–10 minutes to remove any loose carbon fines before use. This ensures your Pentek C1 delivers clear, great-tasting water right from the start.