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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.

Items 1 to 25 of 35 total

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  1. WFDWC40001 DuPont Universal Drinking Water Carbon Block Cartridge

    WFDWC40001 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
  2. WFHDC8001 DuPont Universal Heavy Duty Carbon Wrap 2-Phase Cartridge

    WFHDC8001 DuPont Universal Heavy Duty Carbon Wrap 2-Phase Cartridge

    Fits WFHD13001B Universal Heavy Duty Whole House Filtration System and other brands of 10x4.5-inch filter systems Learn More
  3. CMB-520-HF Advanced Water Products 20-inch x 4.5-inch Replacement Sediment Filter

    Advanced Water Products CMB-520-HF Whole House Filter for IHS22-D4 System

    Made for the Trojan UV Max IHS22-D4 Water Disinfection System Learn More
  4. 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
  5. 158643 Pentek Slim Line Filter Housing with Pressure Relief Valve - Clear

    158643 Pentek Slim Line Filter Housing with Pressure Relief Valve - Clear

    Fits standard 3/8-inch water lines Learn More
    $24.99 Retail Price:  $25.98
  6. TO6 OmniFilter Whole House Filter Replacement Cartridge

    TO6-SS2-S06 OmniFilter Whole House Water Filter Replacement Cartridge

    Fits into any brand of whole house water filtration system that accepts filter cartridges sized 9 3/4 x 4 1/2 inches Learn More
    $22.99 Retail Price:  $24.14
  7. MATRIKX-5-10 KX Technologies MatrikX Undersink Filter Replacement Cartridge

    MATRIKX-5-10 KX Technologies MatrikX Undersink Filter Replacement Cartridge

    Fits any standard housing that uses 9 3/4-inch x 2 1/2-inch replacement filter cartridges Learn More
  8. 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
  9. CRE-1 Pentek Undersink Filter Replacement Cartridge

    CRE-1 Pentek Undersink Filter Replacement Cartridge

    Fits any standard housing that uses 9 3/4-inch x 2 1/2-inch replacement filter cartridges Learn More
    $23.99 Retail Price:  $30.69
  10. CB-45-1001 Hydronix Replacement Whole House Filter Cartridge

    CB-45-1001 Hydronix Replacement Whole House Filter Cartridge

    Fits most housings that accept 10 inch x 4.5 filter cartridges Learn More
    $24.99 Retail Price:  $27.34
  11. 150550 Pentek 3G Whole House Filter System

    150550 Pentek 3G Whole House Filter System

    Fits most industry standard of 10 x 2.5 inch filter cartridges Learn More
    $25.99 Retail Price:  $35.64
  12. CQE-RC-04015 Crystal Quest Reusable Pleated Water Filter

    CQE-RC-04015 Crystal Quest Reusable Pleated Water Filter

    Fits Crystal Quest countertop, undersink and refrigerator water filtration systems Learn More
    $21.99 Retail Price:  $32.19
  13. CQE-RC-04000 Crystal Quest Carbon Block Water Filter Cartridge

    CQE-RC-04000 Crystal Quest Carbon Block Water Filter Cartridge

    Fits Crystal Quest countertop, undersink and refrigerator water filtration systems Learn More
    $23.99 Retail Price:  $28.74
  14. W9121020 Doulton Supersterasyl Undersink Ceramic Candle Replacement Filter Cartridge

    W9121020 Doulton Undersink Ceramic Candle Water Filter Cartridge

    Fits all Doulton Gravity systems Learn More
    $25.99 Retail Price:  $36.02
  15. 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
  16. D-30 Culligan Level 2 Undersink Filter Replacement Cartridge

    D-30 Culligan Level 2 Undersink Filter Replacement Cartridge

    Fits Culligan US-550, US-600, US-600A, SY-2000, SY-2100, and any brand of water filtration system that uses standard 9 3/4 x 2 1/2 filter cartridges Learn More
    $24.99
  17. SY-1000 Culligan Water Filtration System
  18. P1012581 Culligan Undersink Replacement Filter Cartridge

    P1012581 Culligan Undersink Replacement Filter Cartridge

    Fits the Culligan 201 Under Sink Water Filter System Learn More
  19. 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
  20. 3M Aqua-Pure AP-250R Under Sink Water Filter

    AP-250R 3M Aqua-Pure Undersink Water Filter Cartridge

    Fits 3M Aqua-Pure undersink water filtration systems Learn More
    $29.99 Retail Price:  $41.39
  21. QC10-CB1 Pentek Undersink Quick-Change Filter System
  22. P-250A Pentek Undersink Filter Set

    P-250A Pentek Undersink Filter Set

    Fits various brands of under-sink housings, including Culligan, Pentek, Ametek and American Plumber Learn More
    $23.99 Retail Price:  $31.27
  23. P-250 Pentek Undersink Filter Set

    P-250 Pentek Undersink Filter Set

    Fits various brands of under-sink housings, including Culligan, Pentek, Ametek and American Plumber Learn More
    $23.99 Retail Price:  $31.84
  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
  25. 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

Items 1 to 25 of 35 total

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