Reliable Whole House Water Filters – This 3-stage whole house water filter repleacement set includes a 10” x 4.5” sediment filter (FP15B), a carbon block filter (FC15B), and an iron filter (FM15B) to tackle sediments, chlorine, odors, iron, and manganese across your entire water supply. Effective Iron & Manganese Reduction – The FM15B water filter in the third stage is specially designed for iron (up to 3.0 ppm) and manganese (up to 1.0 ppm) removal. Built to Last – Designed for durability, these filters deliver reliable performance for up to 50,000 gallons or 12 months, depending on water usage and quality. It is a long-lasting solution for those seeking a dependable filter replacement. Individually Sealed for Freshness – Each whole house water filter cartridge is factory-wrapped to ensure cleanliness and optimal performance. Just unwrap before installing. Lifetime Support for Peace of Mind – Our U.S.-based customer service team is here to help you every step of the way as you replace whole house water filters and maintain your whole-house system. Healthy Minerals Preserved – These water filters retains beneficial minerals without reducing TDS. For full total dissolved solids removal, consider iSpring Reverse Osmosis systems.