Watts-SF-20 Watts String Wound Cartridge Standard 20" in Size:50 Micron Drop-In Simplicity

Drop-In Simplicity

housing cracks

Lasts 5× longer than carbon block cartridges thanks to KDF's catalytic action and resistance to fouling from organics

Washable design and pack of 4 pricing reduces annual filtration costs compared to single-use depth cartridges

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Watts-SF-20 Watts String Wound Cartridge Standard 20" in Size:50 Micron Drop-In SimplicityThe Watts SF 20 string wound sediment filter delivers reliable mechanical filtration for whole house and under counter systems, removing particles down to 20 or 50 microns depending on the variant you choose. Built with 100% polypropylene construction, this 20" x 2. 5" cartridge offers superior chemical resistance and zero media migration for consistently clean water. SPECIFICATIONS Watts SF 20 Core Specs Dimensions 20" x 2. 5" Standard cartridge size