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 Filter Systems

Undersink Water Filters by DiscountFilterStore.com

23 Item(s)

Grid  List 

Set Ascending Direction
  1. 158008 Pentek Slim Line Filter Housing - Clear

    158008 Pentek Slim Line Water Filter Housing - Clear

    Fits standard 3/8-inch water lines Learn More
    $12.39
  2. 153128 Pentek Filter Housing Sump - Clear
  3. 153029 Pentek Filter Housing Sump

    153029 Pentek Filter Housing Sump

    Fits the cap of Pentek and Culligan HD-950, and #10 Big Blue (not clear) housings of any inlet/outlet size Learn More
    $32.99
  4. 153018 Pentek Slim Line Filter Housing Sump - Clear
  5. 153017 Pentek Slim Line Filter Housing Sump - Blue

    153017 Pentek Slim Line Filter Housing Sump - Blue

    Fits the cap of SY-5197 10-inch Slim Line Housings, as well as other countertop and undersink systems Learn More
    $11.29
  6. US-1500 Pentek Undersink Filter System with Monitor
  7. US-1000 Pentek Undersink Filter System
  8. 158110 Pentek Filter Housing - Clear
  9. 158117 Pentek Slim Line Filter Housing - Clear
  10. 158642 Pentek Slim Line Filter Housing - Blue
  11. BFS-201 Pentek Slim Line Filter Housing with Pressure Relief Valve

    BFS-201 Pentek Slim Line Filter Housing with Pressure Relief Valve

    Fits standard 3/8-inch water lines Learn More
    $53.99
  12. 3G-SLIM-38-NPT10 Pentek Whole House Slim 10 inch Filter Housing
  13. 158643 Pentek Slim Line Filter Housing with Pressure Relief Valve - Clear
  14. PENTEK-SLIM-PR10-JG38 Pentek Undersink Filter 10 inch Housing
  15. SLIM-CLEAR-14-WPR5 Pentek Whole House Slim 5 inch Filter Housing
  16. SLIM-38-PR5 Pentek Whole House Slim 5 inch Filter Housing
  17. SLIM-14-WPR5 Pentek Whole House Slim 5 inch Filter Housing
  18. QC10-TSGAC Pentek Undersink Quick-Change Filter System
  19. QC10-GAC Pentek Undersink Quick-Change Filter System
  20. QC10-EP Pentek Undersink Quick-Change Filter System
  21. QC10-CBR-THREADED Pentek Undersink Quick-Change Filter System
  22. QC10-CBR-JG14 Pentek Undersink Quick-Change Filter System
  23. QC10-CB1 Pentek Undersink Quick-Change Filter System