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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!
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  • You’re guaranteed to find expert help!

Learn more about our No Worries Guarantee

Undersink Water Filters & Systems

Transform the water served from your tap or faucet into a premium quality beverage with an under sink water filter.

With over 250+ under sink water filter systems and undersink replacement filters available in a wide range of flow rates, colors/finishes, prices, and filter life’s, we’ve got an undersink filter for every home. Choose from some of the best under sink water filters including the Crystal Quest 7 Stage Under Sink Fluoride Water Filter System, the Culligan® Level-4 Easy Change Undersink Drinking Water System, and the 3M Filtrete™ Undersink Advanced Water Filter System.

Not sure, which under the sink water filter is right for your home? Give us a call 1-800-277-3458; our experts will help you choose the perfect under sink filter to address all of your water quality concerns, no matter how monumentous they may seem.

Note: All of our under sink filters and under sink water filter systems are backed by our 100% Price Match Guarantee. Meaning if you find a particular under sink water filter for less than our listed price, we’ll match the competitors lower price. Shopping for home water filters has never been easier.

33 Item(s)

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  • CULLIGAN-D-25

    CULLIGAN-D-25

    $11.99
  • KX Matrikx CTO2-12 Reverse Osmosis Carbon Block Replacement Filter
  • AMERICAN-PLUMBER-W5CIP

    AMERICAN-PLUMBER-W5CIP

    $21.99
  • CULLIGAN-1000R-D

    CULLIGAN-1000R-D

    $28.99
  • 750R-D Culligan Level 1 Undersink RV and Marine Icemaker and Drinking Water Filter
  • D-10-TWIN Culligan Level 1 Undersink Filter Replacement Cartridge (2-Pack)
  • D-15 Culligan Level 1 Undersink Filter Replacement Cartridge (2-Pack)
  • D-20A Culligan Level 1 Undersink Water Filter Replacement Cartridge
  • D-250A Culligan Undersink Filter Replacement Cartridge Set
  • D-28 Culligan Level 1 Undersink Filter Replacement Cartridge
  • D-30 Culligan Level 2 Undersink Filter Replacement Cartridge
  • D-40 Culligan Level 4 Undersink Water Filter Replacement Cartridge
  • NCP-10 Culligan Whole House Filter Replacement Cartridge
  • P1012581 Culligan Undersink Replacement Filter Cartridge
  • CULLIGAN-P1-D

    CULLIGAN-P1-D

    $11.99 Retail Price:  $12.98
  • P5-D Culligan Level 4 Whole House Filter Replacement Cartridge (2-Pack)
  • RWC-5 Culligan Level 1 Undersink Filter Replacement Cartridge
  • SY-1000 Culligan Water Filtration System
  • US-600 Culligan Slim Undersink Filter System

    US-600 Culligan Slim Undersink Filter System

    $35.99 Retail Price:  $41.39
  • US-EZ-1 Culligan Level 1 Easy-Change Undersink Filter System
  • US-EZ-3 Culligan Level 3 Easy-Change Undersink Filter System
  • CULLIGAN-US-EZ-4

    CULLIGAN-US-EZ-4

    $77.99 Retail Price:  $86.24
  • GAC-5 Pentek Replacement Filter Cartridge
  • P-250 Pentek Undersink Filter Set

    P-250 Pentek Undersink Filter Set

    $23.99 Retail Price:  $28.99
  • PENTEK-P-250A

    PENTEK-P-250A

    $23.99 Retail Price:  $31.27
  • PENTEK-153017

    PENTEK-153017

    $11.29 Retail Price:  $15.28
  • PENTEK-153018

    PENTEK-153018

    $18.99 Retail Price:  $21.84
  • 153128 Pentek Filter Housing Sump - Clear
  • EP-5 Pentek Replacement Filter Cartridge
  • US-UF3 Culligan Ultrafiltration Drinking Water System
  • US-UF3R Culligan Ultrafiltration Replacement Water Filter Cartridge Set
  • P10-5 Tier1 Polypropylene Sediment Filter

    P10-5 Tier1 Polypropylene Sediment Filter

    Regular Price: $3.99

    Special Price: $2.55

  • P1-5 Tier1 Sediment Filter Cartridge

    P1-5 Tier1 Sediment Filter Cartridge

    Regular Price: $4.99

    Special Price: $2.05

33 Item(s)

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