The Home Depot
4.5 in. x 20 in. 2-Stage Whole House Water Filter Replacement Set, Reduce Chlorine, Scale, Corrosion, Fits WGB22B-DS
Stage 1: FC25B Carbon Block Filter. Stage 2: FWDS150K Anti-Scale Polyphosphate Filter. Reduces scale, corrosion, and up to 99% of chlorine. Lasts up to 12-months or filters up to 250,000 Gal. of water.
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