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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.

Items 1 to 25 of 38 total

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  1. 4373574 Whirlpool Undersink Filter Kit

    4373574 Whirlpool Undersink Filter Kit

    Fits Whirlpool WSC300 and WSC200 filter systems Learn More
  2. 3M Aqua-Pure AP410 Water Filter Cartridges

    AP410 3M Aqua-Pure Water Filter Cartridge Set (2-Pack)

    Fits the 3M Aqua-Pure AP400 and AP400SS Point of Use water filtration systems Learn More
    $64.99 Retail Price:  $71.29
  3. 3M Aqua-Pure AP517 Water Filter Replacement Cartridge

    AP517 3M Aqua-Pure Undersink Filter Replacement Cartridge

    Fits 3M Aqua-Pure undersink water filter systems Learn More
    $66.99 Retail Price:  $70.14
  4. 3M Aqua-Pure AP-C78 Water Filter Replacement Cartridge

    AP-C78 3M Aqua-Pure Undersink Filter Replacement Cartridge

    Fits 3M Aqua-Pure undersink water filter systems Learn More
  5. AP-DW80/90 3M Aqua-Pure Water Filter Set

    AP-DW80/90 3M Aqua-Pure Pre and Post Filter Set

    Fits 3M Aqua-Pure water filter systems Learn More
    $116.99 Retail Price:  $198.46
  6. C-COMPLETE 3M Aqua-Pure Undersink Water Filter

    C-COMPLETE 3M Aqua-Pure Undersink Water Filter Cartridge

    Fits the 3M Aqua-Pure Easy Complete Drinking Water Filtration System Learn More
    $66.99 Retail Price:  $88.54
  7. 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
  8. WI-BG12000C Body Glove Replacement Filter Cartridge

    WI-BG12000C Body Glove Replacement Filter Cartridge

    Fits the Body Glove BG-12000 Water Filter System Learn More
    $290.21 Retail Price:  $386.95
  9. WI-BG3000C Body Glove Replacement Filter Cartridge

    WI-BG3000C Body Glove Replacement Filter Cartridge

    Fits the Body Glove BG-3000 Water Filter System Learn More
    $151.46 Retail Price:  $201.95
  10. WI-BG3000R Body Glove Replacement Filter Cartridge

    WI-BG3000R Body Glove Replacement Filter Cartridge

    Fits existing Everpure C-300 Filtration Systems Learn More
    $138.71 Retail Price:  $184.95
  11. CB6 OmniFilter Whole House Filter Replacement Cartridge

    CB6 OmniFilter Whole House Water Filter Cartridge

    Fits any brand of whole house water filtration system that uses 9 3/4 x 4 1/2 water filter cartridges Learn More
    $83.99
  12. W9120145 Doulton Replacement Candle Set (6-Pack)

    W9120145 Doulton Replacement Candle Set (6-Pack)

    Fits the RIO 2000 High-Flow Multi-Candle filter module Learn More
    $104.99 Retail Price:  $118.30
  13. EV9300-15 Everpure proseries 1500 Replacement Filter Cartridge

    EV9300-15 Everpure proseries 1500 Replacement Filter Cartridge

    Fits Professional Series 1500 Drinking Water Systems Learn More
    $71.99 Retail Price:  $80.78
  14. EV9300-25 Everpure proseries 2500 Replacement Filter Cartridge

    EV9300-25 Everpure proseries 2500 Replacement Filter Cartridge

    Fits Professional Series 2500 Drinking Water Systems Learn More
    $86.99 Retail Price:  $97.16
  15. EV9300-35 Everpure proseries 3500 Replacement Filter Cartridge

    EV9300-35 Everpure proseries 3500 Replacement Filter Cartridge

    Fits Professional Series 3500 Drinking Water Systems Learn More
    $116.99 Retail Price:  $131.66
  16. FXSVC GE SmartWater Undersink Filter Set

    FXSVC GE SmartWater Undersink Filter Set

    Fits any brand of undersink water filter system that uses standard 9 3/4 x 2 1/2 filter cartridges Learn More
    $60.99 Retail Price:  $72.34
  17. 47-5574704 Water Factory Systems FaucetMATE Carbon Block Filter

    47-5574704 Water Factory Systems FaucetMATE Carbon Block Filter

    Fits 3M Cuno Water Factory FaucetMATE FM DWS 1500 one-stage system Learn More
    $63.99 Retail Price:  $105.99
  18. FXSLC GE SmartSetWater Undersink Filter

    FXSLC GE SmartWater Undersink Filter Set

    Fits any brand of undersink water filter system that uses standard 9 3/4 x 2 1/2 filter cartridges Learn More
  19. F-201R InSinkErator Instant Hot Water Dispenser Replacement Filter Cartridge (2-Pack)

    F-201R InSinkErator Instant Hot Water Dispenser Replacement Filter Cartridge (2-Pack)

    Fits the InSinkErator F-201 Water Filtration System, and all Series 1100 and 2200 Instant Hot Water Dispensers Learn More
    $67.99 Retail Price:  $70.00
  20. F-601R InSinkErator Instant Hot Water Dispenser Replacement Filter Cartridge (2-Pack)

    F-601R InSinkErator Instant Hot Water Dispenser Replacement Filter Cartridge (2-Pack)

    Fits the InSinkErator F-201 Water Filtration System, and all Series 1100 and 2200 Instant Hot Water Dispensers Learn More
    $130.99 Retail Price:  $134.42
  21. K-201 Kohler Undersink Replacement Filter Cartridge

    K-201 Kohler Undersink Water Filter Cartridge Replacement

    Fits the Kohler Aquifer Water Filtration System K-200 Learn More
    $96.99 Retail Price:  $132.60
  22. K-202 Kohler Undersink Replacement Filter Cartridge

    K-202 Kohler Undersink Water Filter Cartridge

    Fits the Kohler Aquifer Water Filtration System K-200 Learn More
    $122.99 Retail Price:  $173.40
  23. W9123085 Doulton Imperial UltraCarb Undersink Ceramic Candle Replacement Filter Cartridge

    W9123085 Doulton Imperial UltraCarb Undersink Ceramic Candle Replacement Filter Cartridge

    Fits all Doulton short mount Countertop, Undersink and Inline Systems Learn More
    $65.99 Retail Price:  $109.65
  24. EVERPURE-EV9730-06

    EVERPURE-EV9730-06

    $71.24 Retail Price:  $128.79
  25. BGE-3200 BevGuard Water Filter Cartridge

    BGE-3200 BevGuard Water Filter Cartridge

    Built for use in systems that use the 3M/Cuno CFS 8112-EL 55817-27 and CFS 8812-ELX 56011-03 filters. Learn More
    $75.99 Retail Price:  $96.00

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