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!

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

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.

Items 1 to 48 of 190 total

Page:
  1. 1
  2. 2
  3. 3
  4. 4

Grid  List 

Set Descending Direction
  • W9222900 Doulton Ceramic Water Filter
  • 36005 Hydrologic SmallBoy De-Chlorinator and Sediment Filter System With Upgraded KDF
  • Everpure H-54 Water Filter Replacement Cartridge (EV9730-06)
  • 31050 Hydrologic TallBoy Sediment Filter & Dechlorinator

    31050 Hydrologic TallBoy Sediment Filter & Dechlorinator

    $153.99
    MSRP: $183.95
    Save 16%
  • P-12 Under Sink Water Replacement Filter Cartridge by Tier1
  • 3M Aqua-Pure APDWS1000 Undersink Water Filter System

    APDWS1000 Undersink Water Filter System by 3M Aqua-Pure

    $422.59
    MSRP: $547.99
    Save 23%
  • WFDW120009W DuPont Universal Drinking Water Filter System
  • WFDWC70001 DuPont Universal Drinking Water Carbon Block Cartridge
  • WFDWC40001 DuPont Universal Drinking Water Carbon Block Cartridge
  • DUPONT-WFQTC90001
  • BF7-S-06 OmniFilter Undersink Filter System

    BF7-S-06 OmniFilter Undersink Filter System

    $87.69
    MSRP: $104.99
    Save 16%
  • 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

    $24.99 MSRP: $41.99
    Save 40%
  • WHKF-DB1 Whirlpool Comparable Under Sink Water Filter by Tier1
  • WHKF-DB2 Whirlpool Comparable Under Sink Water Filter by Tier1
  • Pentek QC10-CB1R Carbon Block Quick Change Filter
  • AP327 3M Aqua-Pure Water Filter Replacement Cartridge

    AP327 3M Aqua-Pure Undersink Filter Replacement Cartridge

    $38.99
    MSRP: $50.99
    Save 24%
  • 4373529 Whirlpool Undersink Filter Replacement Cartridge

    4373529 Whirlpool Undersink Filter Replacement Cartridge

    $43.99
    MSRP: $50.59
    Save 13%
  • 4373574 Whirlpool Undersink Filter Kit
  • 4373575 Whirlpool Undersink Filter Kit

    4373575 Whirlpool Undersink Filter Kit

    $64.19
    MSRP: $97.99
    Save 34%
  • 600R American Plumber Undersink Filter Replacement Cartridge

    600R American Plumber Undersink Water Filter Cartridge

    $31.99
    MSRP: $35.06
    Save 9%
  • DW-2000-RB American Plumber Replacement Filter Cartridge

    DW-2000-RB American Plumber Replacement Filter Cartridge

    $59.99
    MSRP: $61.28
    Save 2%
  • DW-200-R American Plumber Undersink Filter Replacement Cartridge
  • W5CIP American Plumber Undersink Filter Replacement Cartridge (2-Pack)
  • WGCHD American Plumber Undersink Water Filter Replacement Cartridge
  • 3M Aqua-Pure AP200 Under Sink Water Filter

    AP200 3M Aqua-Pure Undersink Water Filtration System

    $87.05
    MSRP: $160.99
    Save 46%
  • 3M Aqua-Pure AP217 Under Sink Water Filter

    3M Aqua-Pure AP217 Undersink Filter Replacement Cartridge

    $38.99
    MSRP: $52.99
    Save 26%
  • 3M Aqua-Pure AP22 Under Sink Water Filter
  • 3M Aqua-Pure AP-250R Under Sink Water Filter

    AP-250R 3M Aqua-Pure Undersink Water Filter Cartridge

    $32.09
    MSRP: $47.99
    Save 33%
  • 3M Aqua-Pure AP317 Water Filter Replacement Cartridge

    AP317 3M Aqua-Pure Undersink Filter Replacement Cartridge

    $56.69
    MSRP: $78.99
    Save 28%
  • 3M Aqua-Pure AP410 Water Filter Cartridges

    AP410 3M Aqua-Pure Water Filter Cartridge Set (2-Pack)

    $69.49
    MSRP: $89.99
    Save 23%
  • 3M Aqua-Pure AP517 Water Filter Replacement Cartridge

    AP517 3M Aqua-Pure Undersink Filter Replacement Cartridge

    $71.69
    MSRP: $88.99
    Save 19%
  • 3M Aqua-Pure AP-C77 Undersink Filter Replacement Cartridge
  • 3M Aqua-Pure AP-C78 Water Filter Replacement Cartridge
  • 3M Aqua-Pure AP-DW70 Undersink Filter Replacement Cartridge

    AP-DW70 3M Aqua-Pure Undersink Filter Replacement Cartridge

    $47.99
    MSRP: $56.34
    Save 15%
  • AP-DW80/90 3M Aqua-Pure Water Filter Set

    AP-DW80/90 3M Aqua-Pure Pre and Post Filter Set

    $116.99
    MSRP: $173.90
    Save 33%
  • 3M Aqua-Pure AP-DW85 Water Filter Replacement Cartridge

    AP-DW85 3M Aqua-Pure Undersink Filter Replacement Cartridge

    $58.79
    MSRP: $75.99
    Save 23%
  • C-COMPLETE 3M Aqua-Pure Undersink Water Filter

    C-COMPLETE 3M Aqua-Pure Undersink Water Filter Cartridge

    $71.69
    MSRP: $92.99
    Save 23%
  • C-CS-FF 3M Aqua-Pure Undersink Water Filter

    C-CS-FF 3M Aqua-Pure Undersink Water Filter Cartridge

    $43.99
    MSRP: $48.06
    Save 8%
  • C-CS-S 3M Aqua-Pure Undersink Water Filter

    C-CS-S 3M Aqua-Pure Undersink Water Filter Cartridge

    $38.99
    MSRP: $50.99
    Save 24%
  • C-CYST-FF 3M Aqua-Pure Undersink Water Filter

    C-CYST-FF 3M Aqua-Pure Undersink Water Filter Cartridge

    $56.69
    MSRP: $73.99
    Save 23%
  • C-LC 3M Aqua-Pure Undersink Water Filter

    C-LC 3M Aqua-Pure Undersink Water Filter Cartridge

    $50.99
    MSRP: $65.54
    Save 22%
  • EP35R 3M Aqua-Pure Water Filter Cartridge

    EP35R 3M Aqua-Pure Replacement Water Filter Cartridge

    $124.09
    MSRP: $158.99
    Save 22%
  • A101 Aries Undersink Filter Replacement Cartridge

    A101 Aries Undersink Filter Replacement Cartridge

    $33.99
    MSRP: $49.21
    Save 31%

Items 1 to 48 of 190 total

Page:
  1. 1
  2. 2
  3. 3
  4. 4

Grid  List 

Set Descending Direction
Scroll To Top