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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. 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:  $131.09
  2. 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:  $109.24
  3. 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
  4. 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
    $66.99 Retail Price:  $73.36
  5. 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
  6. 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:  $77.61
  7. DUPONT-WFQTC90001

    DuPont WFQTC90001 Quick Twist 3rd Stage Replacment Filter

    Fits the Dupont-WFQT39000 Quick Twist Water Filter System Learn More
    $61.99 Retail Price:  $84.99
  8. RC-0.5 Rainshow’r Replacement Water Filter

    RC-0.5 Rainshow’r Replacement Water Filter

    Fits into the C-200 Condor or BT-300 Breakthrough water filtration systems by Rainshow'r Learn More
    $92.99 Retail Price:  $115.00
  9. 20035 Hydrologic 4-Stage Reverse Osmosis Cartridge

    20035 Hydrologic 4-Stage Reverse Osmosis Cartridge

    Fits the Hydrologic EcoSpring water purification system Learn More
    $184.99 Retail Price:  $215.04
  10. EV9601-77 Everpure VOC #2 Replacement Filter Cartridge

    EV9601-77 Everpure VOC #2 Replacement Filter Cartridge

    Fits the Everpure QC4-VOC, ROM II, and ROM III systems Learn More
    $125.99 Retail Price:  $147.19
  11. BG-1000C Body Glove Replacement Water Filter Cartridge

    BG-1000C Body Glove Replacement Water Filter Cartridge

    Fits into the Body Glove BG-1000 water filtration system Learn More
    $110.99 Retail Price:  $133.39
  12. WI-BG6000FFC Body Glove Water Filter Cartridge

    WI-BG6000FFC Body Glove Water Filter Cartridge

    For use in the WI-BG6000FF Body Glove Water Filtration System Learn More
    $282.99 Retail Price:  $349.95
  13. BGE-4200S BevGuard Water Filter Cartridge

    BGE-4200S BevGuard Water Filter Cartridge

    For use in systems that use the Everpure 4C, H-54, H-104, H-300, MD-CN, PBS-400, S-100, S-101 and SPA 4002 water filters Learn More
    $65.99 Retail Price:  $89.99
  14. BGE-3200S BevGuard Water Filter Cartridge

    BGE-3200S BevGuard Water Filter Cartridge

    For use in systems that use Everpure 4H, 4K Plus, H-100, H-200, H-300+M, H-1200, MD-HN, OW 200L, OW4-Plus and S-200 water filters Learn More
    $84.99 Retail Price:  $107.00
  15. 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
  16. 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
  17. CQE-RC-04020 Crystal Quest Nitrate Water Filter Cartridge
  18. 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
    $138.99 Retail Price:  $178.24
  19. CQE-RC-04003 Crystal Quest Multi Stage ULTRA Water Filter Cartridge

    CQE-RC-04003 Crystal Quest Multi Stage ULTRA Water Filter Cartridge

    Fits Crystal Quest countertop, undersink and refrigerator water filtration systems Learn More
    $64.99 Retail Price:  $91.99
  20. 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
  21. US-UF3R Culligan Ultrafiltration Replacement Water Filter Cartridge Set

    US-UF3R Culligan Ultrafiltration Replacement Water Filter Cartridge Set

    Fits Culligan US-UF3 Ultrafiltration system Learn More
    $95.99 Retail Price:  $145.99
  22. 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
    $152.99 Retail Price:  $173.86
  23. 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
    $293.99 Retail Price:  $330.82
  24. 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
  25. 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

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