Big Blue Big white Ion Exchange Resin Refillable 20" x 4.5"

Big White Blue GAC Granular Activated Carbon with Phosphate Replacement Water Filter Cartridge 20" inch x 4/5" Inch.

It reduces scale from your water supply.

For use with all Whole supply Point of entry systems, Softening applications, commercial and industrial, window cleaning equipment and filtration systems and some domestic/residential drinking water filtration/purification devices.

This is a 20" x 4.5" GAC Scale Reduction water filter cartridge. This cartridge will suit all 20" x 4.5" big blue or big white housings.