Softening Resin Filter Cation Ion Exchange 4.5" x 20" Big Blue Size

The CAT-4520 softening cation resin filter is used for the reduction of hard water using an ion exchange process.

The CAT-4520 water softening filter cartridge reduces hardness minerals and scale deposits in low flow rate residential and commercial applications. It is made of NSF Certified cation softening resin. The CAT-4520 includes polypropylene pre- and post-filters to reduce sediment and the possibility of water bypassing the resin.

This water softening filter cartridge is used for treatment of residential and commercial water.

• 5,889 Max grain capacity
• NSF Certified Cation Softening Media.
• Refillable / Reusable
• Max Flow Rate: 2 GPM
• Made from NSF Certified materials
• Fits 4.5" x 20" whole house water filtration systems including Big Blue Housings
• End Caps: High impact
• Body: Polystyrene
• Gasket: Buna-N
• Size: 20" x 4.5"
• Max Temp: 100 F

Replace or regenerate every 5,889 grains usage (approx 2-3 months of regular use) or when softening performance is reduced. Life capacity depends on hardness and water quality.