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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. 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
  2. QC10-EPR Pentek Undersink Quick-Change Replacement Filter Cartridge

    QC10-EPR Pentek Quick-Change Replacement Water Filter Cartridge

    Fits any Pentek Quick-Change Series water filtration system heads Learn More
    $22.09 Retail Price:  $27.70
  3. EP-5 Pentek Replacement Filter Cartridge

    EP-5 Pentek Replacement Filter Cartridge

    Fits most housings that accept standard 5-inch x 2.5-inch water filter cartridges Learn More
  4. P-12 Under Sink Water Replacement Filter Cartridge by Tier1
  5. CQE-RC-04036 Crystal Quest Carbon Block Water Filter Cartridge

    CQE-RC-04036 Crystal Quest Carbon Block Water Filter Cartridge

    Fits Crystal Quest countertop, undersink and refrigerator water filtration systems Learn More
    $37.99 Retail Price:  $45.99
  6. C2-02 Advanced Water Products 20-inch x 4.5-inch Replacement Carbon Whole House Filter

    C2-02 Advanced Water Products Replacement 20-inch x 4.5-inch Carbon Whole House Filter

    Fits most 20-inch x 4.5-inch filter housings, including the Trojan UV Max IHS12-D4 and IHS22-D4 Water Disinfection Systems Learn More
    $54.99 Retail Price:  $89.00
  7. 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
  8. 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
  9. CQE-RC-04014 Crystal Quest Carbon Block Water Filter Cartridge

    CQE-RC-04014 Crystal Quest Carbon Block Water Filter Cartridge

    Fits Crystal Quest countertop, undersink and refrigerator water filtration systems Learn More
    $25.99 Retail Price:  $32.19
  10. C-CS-FF Aqua-Pure Undersink Filter Replacement Cartridge

    C-CS-FF Aqua-Pure Undersink Water Filter Cartridge

    Fits the Aqua-Pure Easy Full Flow Drinking Water Filtration System Learn More
    $40.99 Retail Price:  $48.06
  11. 3US-AF01 Filtrete Undersink Filter Replacement Cartridge

    3US-AF01 Filtrete Undersink Filter Replacement Cartridge

    Fits Filtrete 3US-AS01, 3US-PS01, and Whirlpool WHCF-SUF, WHCF-SUFC water filter systems Learn More
    $22.99 Retail Price:  $26.44

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