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Replacement Water Filters: Undersink

Keep your kitchen space neat and tidy, while reducing contaminants in your tap water with an under sink water filter system.

The beauty of under sink water filter systems is that they neatly fit underneath your sinks and don’t rob you of valuable counter space as countertop water filters do. Unlike other filter models, with under sink water filters there are no valves or tubing cluttering your counter. Because they remain out of sight, you can install larger under sink water filter models designed to filter out additional water contaminants such as fluorides, arsenic, and nitrates.

Below you’ll find over 60+ OEM under sink water filter systems, housings and filters from some of the top brands, including Pentek®, Culligan®, Whirlpool®, Doulton®, OmniFilter®, and more.

Need help choosing the right under sink water filter system? Our experts can help you choose the perfect under sink water filter to address all of your water quality concerns, just give us a call at 1-800-277-3458.

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  1. KX-TECHNOLOGIES-32-250-125-050

    KX-TECHNOLOGIES-32-250-125-050

    $9.99 Retail Price:  $10.34
  2. KX-MATRIKX-CTO2-10

    KX-MATRIKX-CTO2-10

    $9.99 Retail Price:  $10.34
  3. ECP5-10 Pentek Undersink Filter Replacement Cartridge

    ECP5-10 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
    $5.99 Retail Price:  $9.42
  4. PENTEK-C2

    PENTEK-C2

    $5.99 Retail Price:  $8.84
  5. PENTEK-C1

    PENTEK-C1

    $6.99 Retail Price:  $9.42
  6. RS2SS

    RS2SS

    $6.99 Retail Price:  $8.04
  7. QC10-TSGACR Pentek Undersink Quick-Change Replacement Filter Cartridge

    QC10-TSGACR Pentek Quick-Change Replacement Water Filter Cartridge

    Fits any Pentek Quick-Change Series water filtration system head Learn More
    $16.99 Retail Price:  $21.84
  8. TO1SS OmniFilter Whole House Filter Replacement Cartridge

    TO1SS OmniFilter Whole House Water Filter Replacement Cartridge

    Designed to fit into any brand of whole house water filtration system that accepts standard 9 3/4 x 2 1/2 inch cartridges Learn More
    $6.99 Retail Price:  $8.15
  9. 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
    $19.99 Retail Price:  $24.14
  10. 47-55708G2 Water Factory Systems Replacement Filter Cartridge

    47-55708G2 Water Factory Systems Replacement Filter Cartridge

    Fits 3M Cuno Water Factory FaucetMATE FM-2-CTO two-stage system Learn More
    $43.99 Retail Price:  $52.89
  11. PENTEK-QC10-EPR

    PENTEK-QC10-EPR

    $22.09 Retail Price:  $27.70
  12. PENTEK-EP-5
  13. P-12 Under Sink Water Replacement Filter Cartridge by Tier1
  14. CRYSTAL-QUEST-CQE-RC-04036
  15. ADVANCED-WATER-C2-02

    ADVANCED-WATER-C2-02

    $54.99 Retail Price:  $89.00
  16. 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
    $27.99 Retail Price:  $39.97
  17. ADVANCED-WATER-CMB-510-HF
  18. 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
    $22.99 Retail Price:  $32.92
  19. CRYSTAL-QUEST-CQE-RC-04035
  20. CRYSTAL-QUEST-CQE-RC-04034
  21. CRYSTAL-QUEST-CQE-RC-04020
  22. WHEEDF Whirlpool UltraEase Water Filter Pack

    WHEEDF Whirlpool UltraEase Water Filter Pack

    Fits the WHED20 Whirlpool dual stage drinking water filtration system Learn More
    $49.99 Retail Price:  $59.79
  23. E5722-P Omnipure Carbon Block Water Filter

    E5722-P Omnipure Carbon Block Water Filter

    Fits systems that use the Everpure 4CB5-S water filter cartridge Learn More
    $33.99 Retail Price:  $49.99
  24. CRYSTAL-QUEST-CQE-RC-04015
  25. CRYSTAL-QUEST-CQE-RC-04014

    CRYSTAL-QUEST-CQE-RC-04014

    $25.99 Retail Price:  $32.18

Items 1 to 25 of 47 total

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