20" x 4.5" 1 Micron Carbon Block Replacement Filter Cartridge, NSF 42 Certified, Compatible with Whole House Water Filter System, Removes Chlorine, Heavy Metals, Odors & Color, 4 Pack

Superior Filtration Performance: Our 20" x 4.5" carbon block water filter is crafted with premium coconut shell carbon, which effectively captures impurities larger than 1 micron — including fine silt and micro rust that conventional 5-micron filters often fail to trap. Beyond particle filtration, it powerfully reduces chlorine, unpleasant tastes, discoloration and odors, delivering crisp, fresh and crystal-clear water ideal for residential use.

Stable Water Pressure: Designed for high daily use and large households, this filter maintains consistent water pressure and flow. Each single filter cartridge delivers a long service life of 6–12 months or up to 100,000 gallons, with actual lifespan varying according to water quality and usage frequency.

Protects Appliances & Plumbing: Working in tandem with your sediment filter cartridge, this carbon filter captures residual impurities while blocking sediment and mineral buildup. Together, they help prevent clogs and extend the service life of water heaters, dishwashers, and entire plumbing systems, keeping your household equipment running smoothly and reducing costly repairs.

NSF Certified & Reliably Tested: This carbon block filter is tested in compliance with NSF 42 standards and has passed 6 independent tests—including pressure and performance verification—for consistent, safe operation. For best results, flush the filter for 15 minutes before first use.

Wide Compatibility & Easy Installation: This carbon block filter fits most standard 20-inch filter housings, making it an ideal water filter replacement for whole-house and under-sink water filtration systems. Simple to install and long-lasting, it provides reliable, low-maintenance filtration for your home.

coconut shell activated carbon