Essential Replacement for WGB31B-PFKDS – This 3-stage PFAS water filter replacement set is specially designed for the iSpring WGB31B-PFKDS whole house water filtration system. Ideal for treating well water, city water, or any whole-home water setup. Effective PFAS Water Filter – The FC15B-PF carbon filter contains SGS-tested filtration media, targets up to 99% of PFAS (including PFOA and PFOS), making it one of the top water filters that remove PFAS for whole house applications. Heavy Metal & Chlorine Reduction – The FG15B-KS GAC KDF filter removes chlorine, lead, mercury, hydrogen sulfide (H₂S), chloramine, radon, and other harmful contaminants, providing protection for your family and extending the life of whole house water filters and plumbing. Dependable Scale Protection – The FWDS180K polyphosphate water descaler reduces scale from calcium and magnesium, preventing internal corrosion and prolonging the efficiency of appliances and hot water heaters. Built to Last – This home water filter whole house replacement pack filters up to lasts up to 12 months, depending on water quality and usage. Peace of Mind Guaranteed – Supported by lifetime technical support from our U.S.-based customer service team. We’re here to assist you every step of the way as you replace filters and keep your whole-house system performing at its best. Please Note – This filter retains healthy minerals and does not reduce TDS. For total dissolved solids removal, explore our iSpring reverse osmosis systems. Fresh and Ready — Individually sealed cartridges maintain maximum freshness. Please remove the wrap before use.