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

My Cart:

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

Free Shipping over $39

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

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.

15 Item(s)

Grid  List 

Set Descending Direction
  • Whirlpool WHKF-GAC Undersink Replacement Water Filter Cartridge
  • PENTEK-EP-5

    PENTEK-EP-5

  • 3MFF101 Aqua-Pure Replacement Water Filter Cartridge

    3MFF101 Aqua-Pure Replacement Water Filter Cartridge

    $179.99 Retail Price:  $209.29
  • AP217 Aqua-Pure Undersink Filter Replacement Cartridge
  • PD-5-934 Pentek Undersink Filter Replacement Cartridge
  • GXULQR

    GXULQR

    $39.99 Retail Price:  $43.69
  • PENTEK-GAC-20

    PENTEK-GAC-20

    $21.99 Retail Price:  $23.56
  • P5-478 Pentek Undersink Filter Replacement Cartridge

    P5-478 Pentek Undersink Filter Replacement Cartridge

    $5.99 Retail Price:  $8.15
  • GAC-BB Pentek Replacement Filter Cartridge

    GAC-BB Pentek Replacement Filter Cartridge

    $22.99 Retail Price:  $32.19
  • FILTRETE-3US-PF01

    FILTRETE-3US-PF01

    $37.99 Retail Price:  $43.69
  • RWC-5 Culligan Level 1 Undersink Filter Replacement Cartridge
  • FILTRETE-3US-AF01

    FILTRETE-3US-AF01

    $22.99 Retail Price:  $26.44

15 Item(s)

Grid  List 

Set Descending Direction
Scroll To Top