A.O. Smith Main Faucet-Pack Carbon Block Under Sink Replacement Filter

Replacement filter for: main faucet filter with chlorine, lead, and cyst reduction (AO-MF). Use only certified, genuine A. O. smith replacement filters for continued contaminant removal and system performance. Replacements made easy - no plumber necessary. Basic filtration - reduces up to 99% of 6 harmful contaminants including chlorine, lead, cysts, atrazine, lindane and turbidity. No water is wasted, and nothing is added to your water during the filtration process. IAPMO Tested and Certified to NSF/ANSI standards 42 and 53. Filter lasts 1,389 gallons or 6 months. Includes one carbon block filter.