The 20" x 4.5" Empty Refillable Filter Cartridge is an environmentally friendly alternative to water filtration that is reusable. Recycle, Refill, Reuse. Stop throwing away plastic and filling up landfills. The REC-4520 cartridges can be filled with a variety of medias: calcite for pH adjustment, activated carbon for taste and odor improvement, softening or mixed bed ion exchange resins, and other medias. When the media is exhausted, simply discard the old media and refill the cartridge with new media. These cartridges come standard with built-in pre and post filters to keep the media from being washed out of the filter cartridge.
Features:

• Refillable Empty Cartridges
• Durable Construction
• Excellent Flow Rate
• Prefilter and Postfilter: 20 micron polypropylene pad
• Reusable and environmentally friendly option

Specifications: 

• Approx. Volume: 0.16 cubic feet of media
• Color/Finish: White
• Gaskets: Buna-N

Suggested granular activated carbon for the REC-4520 cartridges: Use the Neo-Pure GAC-4PK Coconut Shell GAC Pillow Packs
to conveniently refill a reusable filter cartridge and save the environment by not discarding plastic. For your convenience, we offer a filter option that includes these activated carbon packs with your new filter purchase: 20" x 4.5" Refillable Filter Cartridge w/ GAC.