IF-4103 Replacement GAC Inline Post Filter

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Fresh taste, simple swap The IF-4103 is a granular activated carbon (GAC) inline post filter that improves taste, removes residual odors, and polishes water after RO or carbon syst ems. Its compact 2" × 10" inline design and 1/4" FPT ports allow easy installation in tight spaces. A coconut-shell carbon blend provides clean, fresh-tasting water for residential and light commercial applications. Restores clean taste & odor with coconut‑shell GAC polishing. Fits 2″×10″ inline housings with 1/4″ FPT ends (threaded). Annual replacement post filter for Vertex/RO setups. IsoTwist installations that were built with an inline post filter, and Vertex PureWaterMachine / GreenMachine RO systems that specify IF‑4103 Show more