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

When we protect your filter purchase with our No Worries Guarantee, we mean it!

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  • Our products are price match guaranteed!
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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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19 Item(s)

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  • CB1-10 Pentek Carbon Block Water Filter Replacement

    CB1-10 Pentek Carbon Block Water Filter Replacement

    $15.39
    MSRP: $23.99
    Save 36%
  • RFC-93 Whole House Filter Replacement Cartridge by Tier1
  • Pentek QC10-CB1R Carbon Block Quick Change Filter
  • GAC-5 Pentek Replacement Filter Cartridge
  • PENTEK-P-250

    PENTEK-P-250

    $33.99
    MSRP: $41.99
    Save 19%
  • P-250A Pentek Undersink Filter Set
  • QC10-CB1 Pentek Undersink Quick-Change Filter System
  • PENTEK-QC10-CBR-JG14

    PENTEK-QC10-CBR-JG14

    $33.99
    MSRP: $35.41
    Save 4%
  • QC10-CBR-THREADED Pentek Undersink Quick-Change Filter System
  • PENTEK-QC10-CBRR

    PENTEK-QC10-CBRR

    $22.99
    MSRP: $36.79
    Save 38%
  • QC10-EP Pentek Undersink Quick-Change Filter System

    QC10-EP Pentek Quick-Change Filter System

    $29.99
    MSRP: $34.26
    Save 12%
  • PENTEK-QC10-EPR

    PENTEK-QC10-EPR

    $24.69
    MSRP: $27.70
    Save 11%
  • PENTEK-QC10-GAC

    PENTEK-QC10-GAC

    $23.69
    MSRP: $30.69
    Save 23%
  • QC10-GACR Pentek Undersink Quick-Change Replacement Filter Cartridge
  • PENTEK-QC10-TSGAC

    PENTEK-QC10-TSGAC

    $26.39
    MSRP: $31.84
    Save 17%
  • PENTEK-QC10-TSGACR

    PENTEK-QC10-TSGACR

    $19.99
    MSRP: $21.84
    Save 8%
  • PENTEK-US-1000

    PENTEK-US-1000

    $130.79
    MSRP: $139.71
    Save 6%
  • PENTEK-US-1500

    PENTEK-US-1500

    $172.09
    MSRP: $195.37
    Save 12%
  • CBR2-10R Pentek Undersink Filter Replacement Cartridge

    CBR2-10R Pentek Undersink Filter Replacement Cartridge

    $19.59
    MSRP: $27.99
    Save 30%

19 Item(s)

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