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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  • F-201R InSinkErator Instant Hot Water Dispenser Replacement Filter Cartridge (2-Pack)
  • F-601R InSinkErator Instant Hot Water Dispenser Replacement Filter Cartridge (2-Pack)
  • 8014931 Katadyn Vario Backcountry Series Microfilter Water Filter
  • Everpure H-54 Water Filter Replacement Cartridge (EV9730-06)
  • WFDW120009W DuPont Universal Drinking Water Filter System
  • WFDWC70001 DuPont Universal Drinking Water Carbon Block Cartridge
  • WFDWC20001 DuPont Universal Drinking Water Carbon Block Cartridge
  • WFDWC40001 DuPont Universal Drinking Water Carbon Block Cartridge
  • DUPONT-WFQTC90001
  • R200 Samsung Inline Water Filter Replacement by Tier1

    R200 OmniFilter Inline Water Filter Replacement by Tier1

    $6.99 MSRP: $10.34
    Save 32%
  • NCP-BB Pentek Whole House Water Filter

    NCP-BB Pentek Whole House Filter Replacement Cartridge

    $32.99 MSRP: $36.34
    Save 9%
  • Everpure EV9617-36 Comparable Food Service Replacement Filter by Tier1
  • W5CIP American Plumber Whole House Carbon Water Filter by Tier1
  • D-10 Twin Culligan Comparable Whole House Carbon Water Filter by Tier1
  • WH-STDCW-F02 Filtrete Comparable Whole House Carbon Filter by Tier1
  • TO1DS OMNIFILTER Comparable Whole House Carbon Water Filter by Tier1 (2-Pack)
  • C1 Pentek Comparable Whole House Carbon Water Filter by Tier1
  • P-250 Pentek Comparable Under Sink Water Filter Set Tier1
  • D-250A Culligan Comparable Under Sink Water Filter Set by Tier1
  • P-250 Pentek Comparable Under Sink Water Filter Set by Tier1
  • P-250A Pentek Comparable Under Sink Filter Set by Tier1

    P-250A Pentek Comparable Under Sink Filter Set by Tier1

    $21.99 MSRP: $41.99
    Save 48%
  • WHKF-DB1 Whirlpool Comparable Under Sink Water Filter by Tier1
  • WHKF-DB2 Whirlpool Comparable Under Sink Water Filter by Tier1
  • AP717 3m Aqua-Pure Comparable Inline Water Filter by Tier1

    AP717 3M Aqua-Pure Comparable Inline Water Filter by Tier1

    $6.99 MSRP: $10.34
    Save 32%
  • CL10ROT33-B Omnipure Comparable Inline Water Filter by Tier1
  • WHKF-IMTO Whirlpool Comparable Inline Water Filter by Tier1

    WHKF-IMTO Whirlpool Comparable Inline Water Filter by Tier1

    $6.99 MSRP: $10.34
    Save 32%
  • ICF-10Q Hydronix Comparable Inline Water Filter by Tier1

    ICF-10Q Hydronix Comparable Inline Water Filter by Tier1

    $6.99 MSRP: $10.34
    Save 32%
  • K2333-JJ Omnipure Comparable Inline Water Filter by Tier1

    K2333-JJ Omnipure Comparable Inline Water Filter by Tier1

    $6.99 MSRP: $10.34
    Save 32%
  • K2540-JJ Omnipure Comparable Inline Water Filter by Tier1
  • DD-7098 Daewoo Comparable Inline Water Filter by Tier1

    DD-7098 Daewoo Comparable Inline Water Filter by Tier1

    $6.99 MSRP: $10.34
    Save 32%
  • K2533BB Omnipure Comparable Inline Water Filter by Tier1

    K2533BB Omnipure Comparable Inline Water Filter by Tier1

    $6.99 MSRP: $10.34
    Save 32%
  • K5567JJ Omnipure Comparable Inline Water Filter by Tier1

    K5567JJ Omnipure Comparable Inline Water Filter by Tier1

    $6.99 MSRP: $10.34
    Save 32%
  • CL10ROT33-C-Omnipure Comparable Inline Water Filter by Tier1
  • GS-10ALS-JG14 Pentek Comparable Inline Water Filter by Tier1
  • CL10ROT40-B Omnipure Comparable Inline Water Filter by Tier1
  • AICRO-JGK Watts Comparable Inline Water Filter by Tier1

    AICRO-JGK Watts Comparable Inline Water Filter by Tier1

    $6.99 MSRP: $10.34
    Save 32%
  • K2528-JJ Omnipure Comparable Inline Water Filter by Tier1
  • K2567-BB Omnipure Comparable Inline Water Filter by Tier1

    K2567-BB Omnipure Comparable Inline Water Filter by Tier1

    $6.99 MSRP: $10.34
    Save 32%
  • CL10ROT40-C Omnipure Comparable Inline Water Filter by Tier1
  • K5586-JJ Omnipure Comparable Inline Water Filter by Tier1

    K5586-JJ Omnipure Comparable Inline Water Filter by Tier1

    $6.99 MSRP: $10.34
    Save 32%
  • GS-10-JG14 Pentek Comparable Inline Water Filter by Tier1

    GS-10-JG14 Pentek Comparable Inline Water Filter by Tier1

    $6.99 MSRP: $10.34
    Save 32%
  • K5528-BB Omnipure Comparable Inline Water Filter by Tier1

    K5528-BB Omnipure Comparable Inline Water Filter by Tier1

    $6.99 MSRP: $10.34
    Save 32%
  • CL10ROT28-A Omnipure Comparable Inline Water Filter by Tier1
  • K2533TJ Omnipure Comparable Inline Water Filter by Tier1

    K2533TJ Omnipure Comparable Inline Water Filter by Tier1

    $6.99 MSRP: $10.34
    Save 32%
  • WS-21 Water Sentinel Comparable Inline Water Filter by Tier1
  • K2540-TJ Omnipure Comparable Inline Water Filter by Tier1
  • K5553-BB Omnipure Comparable Inline Water Filter by Tier1

    K5553-BB Omnipure Comparable Inline Water Filter by Tier1

    $6.99 MSRP: $10.34
    Save 32%
  • K5686-BB Omnipure Comparable Inline Water Filter by Tier1

Items 1 to 48 of 146 total

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