Watts SF-20-425 20" x 4.5" String Wound Standard Filter Cartridges PureT (B890-BK34) 20" Filter Housing 3/4" NPT Blue/Black this filter combines dense carbon

this filter combines dense carbon block filtration with phosphate treatment to address chlorine

and rust staining in whole-house water systems

Ball Material

Covers 0-0

Watts SF-20-425 20" x 4.5" String Wound Standard Filter Cartridges PureT (B890-BK34) 20" Filter Housing 3/4" NPT Blue/Black this filter combines dense carbonThe Watts SF 20 425 delivers true depth filtration through precision string wound polypropylene construction, engineered for demanding commercial, whole house, and well water applications. This 20" x 4. 5" cartridge handles everything from mineral acids to caustic alkalis with exceptional dirt holding capacity and minimal media migration. SPECIFICATIONS Watts SF 20 425 Technical Details Dimensions 20" x 4. 5" Micron Rating 5 Micron Filter Media