Reliable Whole House Water Filtration – F3WGB31BMKS whole house water filter replacement pack includes a 10” x 4.5” sediment filter, a GAC and KDF compound filter, and an iron filter to tackle sediments, chlorine, heavy metals, hydrogen sulfide, odors, iron, and manganese across your entire water supply. Targeted Iron & Manganese Reduction – The specialized iron filter (FM15B) is engineered to effectively reduce iron (up to 3.0 ppm) and manganese (up to 1.0 ppm), protecting your plumbing, appliances, and water quality. Powerful Heavy Metal Reduction – The FG15B-KS water filter in the second stage uses a GAC KDF media to remove chlorine, lead, mercury, hydrogen sulfide, heavy metals, pesticides, herbicides, odors, and other contaminants found in both city and well water. Long-Lasting Performance – Built for durability and steady flow, this whole house water filter treats up to 50,000 gallons or 12 months, providing families with reliable, long-term filtration. Lifetime U.S. Support – Our friendly customer service team is always ready to guide you through filter replacement and whole-house system maintenance. Fresh & Ready — Cartridges arrive individually sealed to maintain top filtration quality. Unwrap before installing. Please Note – This filter retains healthy minerals and does not reduce TDS. For total dissolved solids removal, explore our iSpring Reverse Osmosis systems.