Discount Water Filters and Air Filters at Discount Filter Store.com

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Undersink Water Filters & Systems

Transform the water served from your tap or faucet into a premium quality beverage with an under sink water filter.

With over 250+ under sink water filter systems and undersink replacement filters available in a wide range of flow rates, colors/finishes, prices, and filter life’s, we’ve got an undersink filter for every home. Choose from some of the best under sink water filters including the Crystal Quest 7 Stage Under Sink Fluoride Water Filter System, the Culligan® Level-4 Easy Change Undersink Drinking Water System, and the 3M Filtrete™ Undersink Advanced Water Filter System.

Not sure, which under the sink water filter is right for your home? Give us a call 1-800-277-3458; our experts will help you choose the perfect under sink filter to address all of your water quality concerns, no matter how monumentous they may seem.

Note: All of our under sink filters and under sink water filter systems are backed by our 100% Price Match Guarantee. Meaning if you find a particular under sink water filter for less than our listed price, we’ll match the competitors lower price. Shopping for home water filters has never been easier.

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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. 4373575 Whirlpool Undersink Filter Kit

    4373575 Whirlpool Undersink Filter Kit

    Fits Whirlpool WSR413 and WSC200YW filter systems Learn More
  3. 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
  4. 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 MSRP:  $386.95
  5. Body Glove WI-BG3000C Replacement Filter Cartridge

    WI-BG3000C Body Glove Replacement Filter Cartridge

    Fits the Body Glove BG-3000 Water Filter System Learn More
    $158.96 MSRP:  $192.95
  6. WI-BG3000R Body Glove Replacement Filter Cartridge

    WI-BG3000R Body Glove Replacement Filter Cartridge

    Fits existing Everpure C-300 Filtration Systems Learn More
    $145.46 MSRP:  $174.95
  7. 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
  8. US-EZ-3 Culligan Level 3 Easy-Change Undersink Filter System
  9. US-EZ-4 Culligan Level 4 Easy-Change Undersink Filter System
  10. 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
    $106.00 MSRP:  $118.30
  11. W9320004 Doulton HIS Undersink Water Filtration System

    W9320004 Doulton HIS Undersink Water Filtration System

    Fits 10 inch by 2 inch short thread filter candles Learn More
    $127.00 MSRP:  $235.99
  12. W9330042 Doulton HIP Undersink Water Filtration System

    W9330042 Doulton HIP Undersink Water Filtration System

    Fits 10 inch by 2 inch short thread filter candles Learn More
    $73.00 MSRP:  $107.99
  13. W9330957 Doulton UltraCarb Undersink Ceramic Candle Filter System
  14. W9330962 Doulton Sterasyl Undersink Ceramic Candle Filter System
  15. W9380001 Doulton Undersink Water Filtration System

    W9380001 Doulton Undersink Water Filtration System

    Fits Doulton short mount water filter candles Learn More
    $124.00 MSRP:  $169.99
  16. W9380002 Doulton Undersink Filter System

    W9380002 Doulton HIP3 Undersink Water Filtration System

    Fits 10 inch by 2 inch short thread filter candles Learn More
    $154.00 MSRP:  $230.08
  17. 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 MSRP:  $80.78
  18. 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
    $89.69 MSRP:  $118.99
  19. 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
    $120.49 MSRP:  $170.99
  20. H-300 Everpure Under Sink Filter System

    H-300 Everpure Under Sink Filter System

    $310.99 MSRP:  $373.74
  21. 4US-MAXL-S01 Filtrete Single Stage Drinking Water System
  22. 4US-MAXS-S01 Filtrete Single Stage Drinking Water System
  23. FQSVF GE SmartWater Undersink Filter Set (packaging)

    GE SmartWater FQSVF Undersink Water Filter Replacement Cartridges

    Fits GE SmartWater undersink filter systems Learn More
    $61.99 MSRP:  $83.99
  24. 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
    $62.89 MSRP:  $89.99
  25. CBF1-S-05 OmniFilter Undersink Filter System

    CBF1-S-05 OmniFilter Undersink Water Filtration System

    Engineered to fit standard 1/2-inch NPS supply threads Learn More
    $76.19 MSRP:  $101.99

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