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*

Undersink Water Filters & Systems

Undersink Water Filters by DiscountFilterStore.com

Items 1 to 25 of 26 total

Page:
  1. 1
  2. 2

Grid  List 

Set Descending Direction
  1. WHKF-DB1 Whirlpool Undersink Replacement Filter Cartridge
  2. WHKF-GAC Whirlpool Undersink Replacement Filter Cartridge
  3. TO1SS OmniFilter Whole House Filter Replacement Cartridge
  4. RS7-SS OmniFilter Whole House Filter Replacement Cartridge
  5. RS3-SS OmniFilter Whole House Filter Replacement Cartridge
  6. NCP-10 Pentek Undersink Filter Replacement Cartridge
  7. P1 Pentek Whole House Filter Replacement Cartridge

    P1 Pentek Whole House Filter Replacement Cartridge

    Fits any standard housing that uses 9 3/4-inch x 2 1/2-inch replacement filter cartridges Learn More
    $4.99
  8. P5-478 Pentek Undersink Filter Replacement Cartridge

    P5-478 Pentek Undersink Filter Replacement Cartridge

    Fits any standard housing that uses 5-inch x 2 1/2-inch replacement filter cartridges Learn More
    $5.99
  9. PD-5-934 Pentek Undersink Filter Replacement Cartridge

    PD-5-934 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
    $6.99
  10. R30-478 Pentek Undersink Filter Replacement Cartridge
  11. RS14-DS OmniFilter Whole House Filter Replacement Cartridge (2-Pack)

    RS14-DS OmniFilter Whole House Water Filter Cartridges (2-Pack)

    Fits any brand of whole house water filtration system that uses standard 9 3/4 x 2 1/2 filter cartridges Learn More
    $6.99
  12. RS14-SS OmniFilter Whole House Filter Replacement Cartridge

    RS14-SS OmniFilter Replacement Whole House Water Filter Cartridge

    Fits any brand of whole house water filter system that uses 9 3/4 x 2 1/2 water filter cartridges Learn More
    $2.99
  13. RS2-SS OmniFilter Whole House Filter Replacement Cartridge
  14. GAC-5 Pentek Replacement Filter Cartridge
  15. MATRIKX-CTO2-10 KX Technologies MatrikX Undersink Filter Replacement Cartridge
  16. 32-250-125-050 KX Technologies Replacement Filter Cartridge
  17. C1 Pentek Undersink Filter Replacement Cartridge
  18. C2 Pentek Undersink Filter Replacement Cartridge
  19. CC-10 Pentek Undersink Filter Replacement Cartridge
  20. ECP5-10 Pentek Undersink Filter Replacement Cartridge
  21. EP-5 Pentek Replacement Filter Cartridge
  22. GAC1SS OmniFilter Series C Undersink Filter Replacement Cartridge
  23. EPM-10 Pentek Undersink Filter Replacement Cartridge
  24. GAC-10 Pentek Undersink Filter Replacement Cartridge
  25. NCP-10 Culligan Whole House Filter Replacement Cartridge

    NCP-10 Culligan Whole House Filter Replacement Cartridge

    Fits any brand of whole house water filter system that uses standard 9 3/4 x 2 1/2 filter cartridges Learn More
    $9.99