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Replacement Water Filters: Undersink

Don’t settle for a replacement under sink water filter cartridge that simply fits, find one designed and manufactured specifically for your under sink water filter system.

Discount Filter Store has one of the largest selections of undersink filter cartridges. With under sink filter cartridges available in over 15+ different filter medias, 8+ different sizes (5x2½ - 20x4½), and a wide variety of filter life’s ranging from 250 gallons to 50,000+ gallons, you’re guaranteed to find the under sink water filter system and/or replacement cartridges you need. Choose from hundreds of under sink water filter cartridges from some of the industry’s top brands including American Plumber, Crystal Quest, Pentek®, Culligan®, GE, Aqua-Pure®, Whirlpool®, and more.

24 Item(s)

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  1. P1-5 Tier1 Sediment Filter Cartridge

    P1-5 Tier1 Sediment Filter Cartridge

    Sized 4 7/8 x 2 1/2 inches Learn More

    Regular Price: $5.99

    Special Price: $2.05

  2. P10-5 Tier1 Polypropylene Sediment Filter

    P10-5 Tier1 Polypropylene Sediment Filter

    Sized 4 7/8 x 2 1/2 inches Learn More

    Regular Price: $4.99

    Special Price: $2.55

  3. 3M AquaPure 3MFF101 Whole House Water Filter Cartridge

    3MFF101 3M Aqua-Pure Replacement Water Filter Cartridge

    Fits the 3M Aqua-Pure 3MFF100 Full Flow drinking water system Learn More
    $200.99 Retail Price:  $209.29
  4. EP35R 3M Aqua-Pure Water Filter Cartridge

    EP35R 3M Aqua-Pure Replacement Water Filter Cartridge

    Fits the Everpure water filtration systems that use QL-3 filter valve heads, including the H-300 Learn More
    $115.99 Retail Price:  $123.04
  5. C-LC Aqua-Pure Undersink Filter Replacement Cartridge

    C-LC Aqua-Pure Undersink Water Filter Cartridge

    Fits the Aqua-Pure Easy Drinking Water System, Easy LC and Easy LP Replacement Systems Learn More
    $50.99 Retail Price:  $65.54
  6. C-CYST-FF Aqua-Pure Undersink Filter Replacement Cartridge

    C-CYST-FF Aqua-Pure Undersink Water Filter Cartridge

    Fits the Aqua-Pure Easy Cyst-FF Replacement System and Easy Full Flow Drinking Water System Learn More
    $52.99 Retail Price:  $56.34
  7. C-CS-S Aqua-Pure Undersink Filter Replacement Cartridge

    C-CS-S Aqua-Pure Undersink Water Filter Cartridge

    Fits the Aqua-Pure Easy CS-S Water Filtration System Learn More
    $37.99 Retail Price:  $42.54
  8. C-CS-FF Aqua-Pure Undersink Filter Replacement Cartridge

    C-CS-FF Aqua-Pure Undersink Water Filter Cartridge

    Fits the Aqua-Pure Easy Full Flow Drinking Water Filtration System Learn More
    $43.99 Retail Price:  $48.06
  9. C-COMPLETE Aqua-Pure Undersink Filter Replacement Cartridge

    C-COMPLETE Aqua-Pure Undersink Water Filter Cartridge

    Fits the Aqua-Pure Easy Complete Drinking Water Filtration System Learn More
    $66.99 Retail Price:  $88.54
  10. AP-DW85 Aqua-Pure Undersink Filter Replacement Cartridge

    AP-DW85 Aqua-Pure Undersink Filter Replacement Cartridge

    Fits Aqua-Pure undersink water filter systems Learn More
    $54.99 Retail Price:  $55.19
  11. AP-DW80/90 Aqua-Pure Pre and Post Filter Set

    AP-DW80/90 Aqua-Pure Pre and Post Filter Set

    Fits Aqua-Pure water filter systems Learn More
    $116.99 Retail Price:  $137.99
  12. W5CIP American Plumber Undersink Filter Replacement Cartridge (2-Pack)

    W5CIP American Plumber Undersink Filter Replacement Cartridge (2-Pack)

    Fits American Plumber W38-PR and most standard size water filter housings Learn More
    $21.99 Retail Price:  $24.34
  13. AP-DW70 Aqua-Pure Undersink Filter Replacement Cartridge

    AP-DW70 Aqua-Pure Undersink Filter Replacement Cartridge

    Fits Aqua-Pure undersink water filter systems Learn More
    $47.99 Retail Price:  $56.34
  14. AP-C78 Aqua-Pure Undersink Filter Replacement Cartridge

    AP-C78 Aqua-Pure Undersink Filter Replacement Cartridge

    Fits Aqua-Pure undersink water filter systems Learn More
  15. AP-C77 Aqua-Pure Undersink Filter Replacement Cartridge

    AP-C77 Aqua-Pure Undersink Filter Replacement Cartridge

    Fits Aqua-Pure undersink water filter systems Learn More
  16. AP517 Aqua-Pure Undersink Filter Replacement Cartridge

    AP517 Aqua-Pure Undersink Filter Replacement Cartridge

    Fits Aqua-Pure undersink water filter systems Learn More
    $68.99 Retail Price:  $70.14
  17. AP410 Aqua-Pure Water Filter Cartridge Set (2-Pack)

    AP410 Aqua-Pure Water Filter Cartridge Set (2-Pack)

    Fits the Aqua-Pure AP400 and AP400SS Point of Use water filtration systems Learn More
    $64.99 Retail Price:  $71.29
  18. AP317 Aqua-Pure Undersink Filter Replacement Cartridge

    AP317 Aqua-Pure Undersink Filter Replacement Cartridge

    Fits Aqua-Pure undersink water filter systems Learn More
    $52.99 Retail Price:  $66.69
  19. AP-250R Aqua-Pure Undersink Filter Replacement Cartridge

    AP-250R Aqua-Pure Undersink Water Filter Cartridge

    Fits Aqua-Pure undersink water filtration systems Learn More
    $29.99 Retail Price:  $41.39
  20. AP22 Aqua-Pure Undersink Filter Replacement Cartridge

    AP22 Aqua-Pure Replacement Undersink Water Filter Cartridge

    Fits Aqua-Pure undersink water filtration systems Learn More
    $61.99 Retail Price:  $75.89
  21. AP217 Aqua-Pure Undersink Filter Replacement Cartridge

    AP217 Aqua-Pure Undersink Filter Replacement Cartridge

    Fits Aqua-Pure undersink water filter systems Learn More
    $36.99
  22. AP327 Aqua-Pure Undersink Filter Replacement Cartridge

    AP327 Aqua-Pure Undersink Filter Replacement Cartridge

    Fits Aqua-Pure undersink water filter systems Learn More
    $37.99
  23. 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
    $21.99 Retail Price:  $23.56
  24. GAC-BB Pentek Replacement Filter Cartridge

    GAC-BB Pentek Replacement Filter Cartridge

    Fits most Big Blue housings that accept 10-inch x 4.5-inch water filter cartridges Learn More
    $25.99 Retail Price:  $32.19

24 Item(s)

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