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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 28 total

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  1. Pentek QC10-CB1R Carbon Block Quick Change Filter

    Pentek QC10-CB1R Carbon Block Quick Change Filter

    Proprietary design fits Pentek QC systems exclusively Learn More
    $22.99 Retail Price:  $31.04
  2. 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
  3. CBC-5 Pentek Undersink Filter Replacement Cartridge

    CBC-5 Pentek Undersink Filter Replacement Cartridge

    Fits in compact 5-inch water filter housings Learn More
    $9.99 Retail Price:  $16.55
  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. Whirlpool WHKF-DB2 Undersink Replacement Water Filter Cartridge

    WHKF-DB2 Whirlpool Undersink Replacement Filter Cartridge

    Fits the Whirlpool WHKF-DUF Under Sink Filter Housing Learn More
    $21.99
  6. WHKF-DB1 Whirlpool Undersink Replacement Filter Cartridge

    WHKF-DB1 Whirlpool Undersink Replacement Filter Cartridge

    Fits the Whirlpool WHKF-DUF Under Sink Filter Housing Learn More
    $15.99 Retail Price:  $17.34
  7. 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
  8. 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
    $290.21 Retail Price:  $349.95
  9. WFDWC70001 DuPont Universal Drinking Water Carbon Block Cartridge

    WFDWC70001 DuPont Universal Drinking Water Carbon Block Cartridge

    Fits WFDW120009W DuPont Universal Drinking Water Filter System and other brands of 10-inch standard-size filter systems Learn More
  10. 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:  $173.86
  11. C-CYST-FF 3M Aqua-Pure Undersink Water Filter

    C-CYST-FF 3M Aqua-Pure Undersink Water Filter Cartridge

    Fits the 3M Aqua-Pure Easy Cyst-FF Replacement System and Easy Full Flow Drinking Water System Learn More
    $52.99 Retail Price:  $56.34
  12. 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
  13. 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:  $159.10
  14. 1000R-D Culligan Level 3 Undersink RV and Marine Icemaker and Drinking Water Filter

    1000R-D Culligan Level 3 Undersink RV and Marine Icemaker and Drinking Water Filter

    Fits Culligan SY1000, SY-1000s, IC-1000, RV-1000, SY-750s, IC-750, and RV-750 filter systems Learn More
    $28.99 Retail Price:  $36.79
  15. CB3 OmniFilter Undersink Filter Replacement Cartridge

    CB3-SS6-06 OmniFilter Undersink Filter Replacement Cartridge

    Fits any brand of undersink water filter system that uses standard 9 3/4 x 2 1/2 filter cartridges Learn More
    $50.99
  16. 3M Aqua-Pure AP-DW85 Water Filter Replacement Cartridge

    AP-DW85 3M Aqua-Pure Undersink Filter Replacement Cartridge

    Fits 3M Aqua-Pure undersink water filter systems Learn More
    $54.99 Retail Price:  $55.19
  17. 600R American Plumber Undersink Filter Replacement Cartridge

    600R American Plumber Undersink Water Filter Cartridge

    Built to fit into American Plumber WIC-600 and DW-600 undersink water filtration systems Learn More
    $31.99 Retail Price:  $35.06
  18. 3M Aqua-Pure AP22 Under Sink Water Filter

    AP22 3M Aqua-Pure Replacement Undersink Water Filter Cartridge

    Fits 3M Aqua-Pure undersink water filtration systems Learn More
    $61.99 Retail Price:  $75.89
  19. QC10-CBRR Pentek Undersink Quick-Change Replacement Filter Cartridge

    QC10-CBRR Pentek Undersink Quick-Change Replacement Filter Cartridge

    Fits any Pentek Quick-Change Series filter heads Learn More
    $22.99 Retail Price:  $36.79
  20. GXULQR GE Undersink Water Filter Replacement Cartridge

    GXULQR GE Undersink Water Filter Replacement Cartridge

    Fits the GE GXULQ and GNULQ Systems Learn More
    $41.99 Retail Price:  $43.69
  21. FXUVC GE SmartWater Undersink Filter Replacement Cartridge

    FXUVC GE SmartWater Undersink Filter Replacement Cartridge

    Fits any brand of undersink water filter system that uses standard 9 3/4 x 2 1/2 filter cartridges Learn More
    $54.99 Retail Price:  $59.79
  22. FXUTC GE SmartWater Undersink Filter Replacement Cartridge

    FXUTC GE SmartWater Undersink Filter Replacement Cartridge

    Fits any brand of undersink water filter system that uses standard 9 3/4 x 2 1/2 filter cartridges Learn More
    $22.99
  23. FXULC GE SmartWater Undersink Filter Replacement Cartridge

    FXULC GE SmartWater Undersink Filter Replacement Cartridge

    Fits any brand of undersink water filter system that uses standard 9 3/4 x 2 1/2 filter cartridges Learn More
    $39.99 Retail Price:  $51.74
  24. FQSVF GE SmartWater Undersink Filter Set (packaging)

    FQSVF GE SmartWater Undersink Filter Set

    Fits GE SmartWater undersink filter systems Learn More
    $56.99
  25. FQSLF GE SmartWater Undersink Filter Set

    FQSLF GE SmartWater Undersink Filter Set (2 Filters)

    Fits GE SmartWater undersink filter systems Learn More
    $38.99 Retail Price:  $47.60

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