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20 x 2.5 Inch Carbon Filters

Save on Replacement Whole House Water Filters at DiscountFilterStore.com


Get improved taste and clarity from just about every faucet around the home with a new whole house water filter cartridge. Below you’ll find a variety of whole house water filter cartridges with a broad range of filter life’s, flow rates, micron ratings, and filter medias. Therefore, no matter what type of whole house water filter system you have or what type of whole house water filter cartridge you’re looking for, you’ll find a water filter cartridge designed to fit both your needs and your system. Choose from over 400+ OEM whole house water filter cartridges in stock, from some of the industry’s top manufacturers, many of which are versatile and designed to fit into a variety of other whole house water filter systems. See all of our whole house water filter products. For added protection and even cleaner, consider adding a reverse osmosis water filter system or a UV water purification system to your existing whole house water filter line.



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  1. CB-25-2010 Hydronix Replacement Filter Cartridge

    CB-25-2010 Hydronix Replacement Filter Cartridge

    Fits most housings that accept 20-inch x 2.5-inch water filter cartridges Learn More
    $15.69 MSRP:  $23.99
  2. EP-20 Pentek Comparable Replacement Filter Cartridge by Tier1

    EP-20 Pentek Comparable Replacement Filter Cartridge by Tier1

    Fits most housings that accept standard 20-inch x 2.5-inch water filter cartridges Learn More

    As Low As $11.04 Per Filter

  3. Pentek RFC-20 Whole House Water Filter Replacement Cartridge

    RFC-20 Pentek Whole House Filter Replacement Cartridge

    Fits Pentek Big Blue and other heavy duty filter housings Learn More

    As Low As $26.17 Per Filter

  4. EPM-20 Pentek Whole House Water Filter

    Pentek EPM-20 Whole House Water Filter Replacement Cartridge

    Fits any standard housing that uses 20-inch x 2 1/2-inch replacement filter cartridges Learn More

    As Low As $12.00 Per Filter

  5. Pentek EP-20 Replacement Water Filter Cartridge

    Pentek EP-20 Water Filter Cartridge Replacements

    Fits most housings that accept standard 20-inch x 2.5-inch water filter cartridges Learn More

    As Low As $15.50 Per Filter

  6. EPM-20 Pentek Comparable Whole House Water Filter by Tier1

    EPM-20 Pentek Comparable Whole House Water Filter by Tier1

    Fits standard 20 x 2.5-inch housings Learn More
    $11.99 MSRP:  $20.99
  7. GAC-20 Pentek Comparable Granular Activated Carbon Water Filter by Tier1

    GAC-20 Pentek Comparable Granular Activated Carbon Water Filter by Tier1

    Fits most housings that accept standard 20-inch x 2.5-inch water filter cartridges Learn More
    $15.99 MSRP:  $20.99
  8. CHLORPLUS-20 Pentek Replacement Whole House Filter
  9. CBC-20 Pentek Comparable Water Filter Cartridge by Tier1

    CBC-20 Pentek Comparable Water Filter Cartridge by Tier1

    Fits filtration system housings that accepts 20 x 2.5 inch cartridges Learn More
    $25.99 MSRP:  $32.77
  10. CB-25-2001 Hydronix Carbon Water Filter Replacement

    CB-25-2001 Hydronix Carbon Water Filter Replacement

    Sized at 20 x 2.5 inches. 1 micron. Learn More
    $28.99 MSRP:  $35.99
  11. FLOPLUS-20 Pentek Replacement Filter Cartridge

    FLOPLUS-20 Pentek Replacement Filter Cartridge

    Fits most housings that accept standard 20-inch x 2.5-inch water filter cartridges Learn More
    $30.99 MSRP:  $38.99
  12. GAC-20 Pentek Replacement Filter Cartridge

    GAC-20 Pentek Replacement Filter Cartridge

    Fits most housings that accept standard 20-inch x 2.5-inch water filter cartridges Learn More
    $18.49 MSRP:  $29.99
  13. MATRIKX-1-20 KX Technologies MatrikX Whole House Filter Replacement Cartridge

    MATRIKX-1-20 KX Technologies MatrikX Whole House Filter Replacement Cartridge

    Fits any standard housing that uses 20-inch x 2 1/2-inch replacement filter cartridges Learn More
    $30.99
  14. MATRIKX-CTO2-20 KX Technologies MatrikX Whole House Filter Replacement Cartridge

    MATRIKX-CTO2-20 KX Technologies MatrikX Whole House Filter Replacement Cartridge

    Fits any standard housing that uses 20-inch x 2 1/2-inch replacement filter cartridges Learn More
    $31.99 MSRP:  $32.19
  15. CBC-20 Pentek Replacement Filter Cartridge

    CBC-20 Pentek Replacement Filter Cartridge

    Fits most housings that accept 20-inch x 2.5-inch water filter cartridges Learn More
    $32.77
  16. CQE-RC-04014 Crystal Quest Carbon Block Water Filter Cartridge

    CQE-RC-04014 Crystal Quest Carbon Block Water Filter Cartridge

    Fits Crystal Quest countertop, undersink and refrigerator water filtration systems Learn More
    $39.99
  17. CQE-RC-04016 Crystal Quest Multi Stage PLUS Water Filter Cartridge

    CQE-RC-04016 Crystal Quest Multi Stage PLUS Water Filter Cartridge

    For use primarily in Crystal Quest low flow countertop and undersink filtration systems. Also fits select refrigerator water filtration systems. Sized 2 7/8 inches by 20 inches. Learn More
    $155.00 MSRP:  $176.99
  18. RFC-20 Whole House Filter Replacement Cartridge by Tier1

    RFC-20 Whole House Filter Replacement Cartridge by Tier1

    Fits most 20X2.5 housings Learn More
    $20.99
  19. EP-20 155529-43 Pentek Carbon Filter Cartridge Comparable Replacement Kit with O-ring and Lubricant by Tier1

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