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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. MATRIKX-Pb1-HD10 KX Technologies MatrikX Undersink Filter Replacement Cartridge

    MATRIKX-PB1-HD10 KX Technologies MatrikX Undersink Filter Replacement Cartridge

    Fits any standard housing that uses 9 3/4-inch x 4 1/2-inch replacement filter cartridges Learn More

    Regular Price: $59.99

    Special Price: $45.05

  2. 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
  3. K-202 Kohler Undersink Replacement Filter Cartridge

    K-202 Kohler Undersink Water Filter Cartridge

    Fits the Kohler Aquifer Water Filtration System K-200 Learn More
    $112.99 Retail Price:  $131.09
  4. K-201 Kohler Undersink Replacement Filter Cartridge

    K-201 Kohler Undersink Water Filter Cartridge Replacement

    Fits the Kohler Aquifer Water Filtration System K-200 Learn More
    $94.99 Retail Price:  $109.24
  5. 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
    $126.99 Retail Price:  $134.42
  6. 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
    $63.99 Retail Price:  $73.36
  7. CRE-1 Pentek Undersink Filter Replacement Cartridge
  8. FXSLC GE SmartWater Undersink Filter Set

    FXSLC 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
  9. 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
  10. WHAB-6010 Whirlpool Replacement Unit B Filter Cartridge

    WHAB-6010 Whirlpool Replacement Unit B Filter Cartridge

    Fits the Whirlpool WHAF-0335AB Filtration System Learn More
    $45.99
  11. Whirlpool WHAB-6009 Replacement Unit A Water Filter Cartridge
  12. 47-5574704 Water Factory Systems FaucetMATE Carbon Block Filter

    47-5574704 Water Factory Systems FaucetMATE Carbon Block Filter

    Fits 3M Cuno Water Factory FaucetMATE FM DWS 1500 one-stage system Learn More
    $66.99 Retail Price:  $77.61
  13. 47-55712G2 Water Factory Systems Replacement Filter Cartridge

    47-55712G2 Water Factory Systems Replacement Filter Cartridge

    Fits 3M Cuno Water Factory FaucetMATE FM-2-CTO two-stage system Learn More
    $42.59 Retail Price:  $51.28
  14. 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
  15. 47-55707G2 Water Factory Systems Replacement Filter Cartridge

    47-55707G2 Water Factory Systems Replacement Filter Cartridge

    Fits 3M Cuno Water Factory FaucetMATE FM-2 Lead Plus and FM-350 DWS systems Learn More
    $43.99 Retail Price:  $74.28
  16. 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
    $23.99 Retail Price:  $36.79
  17. P-12 Under Sink Water Replacement Filter Cartridge by Tier1
  18. 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
  19. 20035 Hydrologic 4-Stage Reverse Osmosis Cartridge

    20035 Hydrologic 4-Stage Reverse Osmosis Cartridge

    Fits the Hydrologic EcoSpring water purification system Learn More
    $184.99 Retail Price:  $215.04
  20. EV9601-77 Everpure VOC #2 Replacement Filter Cartridge

    EV9601-77 Everpure VOC #2 Replacement Filter Cartridge

    Fits the Everpure QC4-VOC, ROM II, and ROM III systems Learn More
    $125.99 Retail Price:  $147.19
  21. 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
  22. CQE-RC-04035 Crystal Quest Carbon Block Water Filter Cartridge

    CQE-RC-04035 Crystal Quest Carbon Block Water Filter Cartridge

    Fits Crystal Quest countertop, undersink and refrigerator water filtration systems Learn More
    $30.99 Retail Price:  $37.94
  23. 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:  $109.24
  24. BG-1000C Body Glove Replacement Water Filter Cartridge

    BG-1000C Body Glove Replacement Water Filter Cartridge

    Fits into the Body Glove BG-1000 water filtration system Learn More
    $110.99 Retail Price:  $133.39
  25. 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

Items 1 to 25 of 112 total

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