When we protect your filter purchase with our No Worries Guarantee, we mean it!

No Worries...
  • Your filters are guaranteed to be the right fit!
  • Our products are price match guaranteed!
  • Our customer service team is guaranteed to answer your call!
  • You’re guaranteed to find expert help!

Learn more about our No Worries Guarantee

Call Toll-Free: 1-800-277-3458

My Cart:

0 item(s) - $0.00
You have no items in your shopping cart.

FREE DELIVERY on orders over $39*

Replacement Water Filters: Undersink

Undersink Water Filters by DiscountFilterStore.com

19 Item(s)

Grid  List 

Set Descending Direction
  1. 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
  2. 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
  3. 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
  4. W9121202 Doulton AquaCera Supersterasyl Undersink Ceramic Candle Replacement Filter Cartridge
  5. C-CS-S Aqua-Pure Undersink Filter Replacement Cartridge

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

    Fits the Aqua-Pure Easy CS-S Water Filtration System Learn More
    $37.99
  6. CB3 OmniFilter Undersink Filter Replacement Cartridge

    CB3-SS6-06 OmniFilter Undersink Filter Replacement Cartridge

    Fits any brand of undersink water filter system that uses standard 9 3/4 x 2 1/2 filter cartridges Learn More
    $36.99
  7. 600R American Plumber Undersink Filter Replacement Cartridge

    600R American Plumber Undersink Water Filter Cartridge

    Built to fit into American Plumber WIC-600 and DW-600 undersink water filtration systems Learn More
    $31.99
  8. AP217 Aqua-Pure Undersink Filter Replacement Cartridge

    AP217 Aqua-Pure Undersink Filter Replacement Cartridge

    Fits Aqua-Pure undersink water filter systems Learn More
    $31.99
  9. WGCHD American Plumber Undersink Filter Replacement Cartridge

    WGCHD American Plumber Undersink Filter Replacement Cartridge

    Fits American Plumber W10-PR and W15-PR and most other heavy duty water filter housings Learn More
    $31.99
  10. FQSLF GE SmartWater Undersink Filter Set
  11. 3US-PF01 Filtrete Undersink Filter Replacement Cartridge
  12. GXULQR GE Undersink Filter Replacement Cartridge

    GXULQR GE Undersink Filter Replacement Cartridge

    Fits the GE GXULQ and GNULQ Systems Learn More
    $39.99
  13. P1012581 Culligan Undersink Replacement Filter Cartridge

    P1012581 Culligan Undersink Replacement Filter Cartridge

    Fits the Culligan 201 Under Sink Water Filter System Learn More
    $33.99
  14. D-40 Culligan Level 4 Undersink Filter Replacement Cartridge
  15. D-250A Culligan Undersink Filter Replacement Cartridge Set

    D-250A Culligan Undersink Filter Replacement Cartridge Set

    Fits the Culligan SY-2300, SY-2300S and SY-2650 systems and any brand of undersink water filter system that uses standard 9 3/4 x 2 1/2 filter cartridges Learn More
    $34.99
  16. W9121750 Doulton Supersterasyl Undersink Ceramic Candle Replacement Filter Cartridge

    W9121750 Doulton Supersterasyl Undersink Ceramic Candle Replacement Filter Cartridge

    Fits Doulton HIP, HIS and HCPS housings (NOT gravity-fed) Learn More
    $34.09
  17. W9121715 Doulton Supersterasyl Undersink Ceramic Candle Replacement Filter Cartridge
  18. W9121200 Doulton Supersterasyl Undersink Ceramic Candle Replacement Filter Cartridge
  19. W9120562 Doulton Sterasyl Undersink Ceramic Candle Replacement Filter Cartridge

    W9120562 Doulton Sterasyl Undersink Ceramic Candle Replacement Filter Cartridge

    Fits the (S) type thread mount in HIP, HCP and HIS housings Learn More
    $34.99