Water Softening Cartridge Big Blue 20" 10 inch x 4.5 inch Big Blue Filters2713 } @media(max-width:640px){

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Prevents scale buildup and corrosion in whole-house water systems with NSF-certified polyphosphate media

providing higher flow rates and longer service intervals than standard 2

KDF-85 Process Media is engineered specifically for point-of-entry whole house systems treating municipal water supplies with elevated iron and hydrogen sulfide levels

Refillable

Water Softening Cartridge Big Blue 20" 10 inch x 4.5 inch Big Blue Filters2713 } @media(max-width:640px){Isopure Water Water Softening Cartridge Big Blue 20" Ion exchange resin cartridge for whole house Big Blue housings 20 Inch Length 4. 5" Diameter Big Blue Compatible Resin Media This 20 inch water softening cartridge fits standard Big Blue 4. 5" x 20" housings and uses ion exchange resin to reduce hardness minerals like calcium and magnesium. Designed for point of use applications or as a pre treatment stage before RO systems in areas with moderately