Discount Water Filters and Air Filters at Discount Filter Store.com

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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.

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  • KX Matrikx CTO2-12 Reverse Osmosis Carbon Block Replacement Filter
  • W5CIP478 American Plumber Undersink Compact Filter Replacement Cartridge (2-Pack)
  • CULLIGAN-750R-D

    CULLIGAN-750R-D

    $18.49
  • US-EZ-1 Culligan Level 1 Easy-Change Undersink Filter System
  • W9120145 Doulton Replacement Candle Set (6-Pack)

    W9120145 Doulton Replacement Candle Set (6-Pack)

    $104.99
    MSRP: $118.30
    Save 11%
  • W9120562 Doulton Sterasyl Undersink Ceramic Candle Replacement Filter Cartridge
  • W9330962 Doulton Sterasyl Undersink Ceramic Candle Filter System
  • FXUTC

    FXUTC

    $23.69
  • EPM-10 Pentek Undersink Filter Replacement Cartridge

    EPM-10 Pentek Undersink Filter Replacement Cartridge

    $9.99
    MSRP: $10.57
    Save 5%
  • QC10-GAC Pentek Undersink Quick-Change Filter System

    QC10-GAC Pentek Quick-Change Water Filter System

    $23.59
    MSRP: $42.99
    Save 45%
  • QC10-GACR Pentek Undersink Quick-Change Replacement Filter Cartridge
  • 47-55708G2 Water Factory Systems Replacement Filter Cartridge
  • MATRIKX-Pb1-10 KX Technologies MatrikX Undersink Filter Replacement Cartridge
  • OMB934-1L Omnipure Alpha Series Undersink Filter Replacement Cartridge
  • C1 Pentek Undersink Filter Replacement Cartridge

    Pentek C1 Undersink Water Filter Replacement Cartridge

    $12.99
    MSRP: $15.34
    Save 15%
  • CBC-5 Pentek Undersink Filter Replacement Cartridge

    CBC-5 Pentek Undersink Filter Replacement Cartridge

    $10.29
    MSRP: $15.99
    Save 36%
  • OMNIPURE-E5620

    OMNIPURE-E5620

    $20.09
    MSRP: $36.79
    Save 45%
  • 7012333 Sub-Zero UC-15I Undercounter Icemaker Comparable Replacement Water Filter by Tier1

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