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 193 to 240 of 251 total

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  • C2 Pentek Undersink Filter Replacement Cartridge

    C2 Pentek Undersink Filter Replacement Cartridge

    $7.99
    MSRP: $8.84
    Save 10%
  • CBC-5 Pentek Undersink Filter Replacement Cartridge

    CBC-5 Pentek Undersink Filter Replacement Cartridge

    $9.99
    MSRP: $16.55
    Save 40%
  • CBR2-10 Pentek Undersink Filter Replacement Cartridge
  • CBR2-10R Pentek Undersink Filter Replacement Cartridge

    CBR2-10R Pentek Undersink Filter Replacement Cartridge

    $18.99
    MSRP: $21.95
    Save 13%
  • CC-10 Pentek Undersink Filter Replacement Cartridge

    CC-10 Pentek Undersink Filter Replacement Cartridge

    $14.99
    MSRP: $15.34
    Save 2%
  • CCBC-10 Pentek Undersink Filter Replacement Cartridge

    CCBC-10 Pentek Undersink Filter Replacement Cartridge

    $18.99
    MSRP: $19.31
    Save 2%
  • CRE-1 Pentek Undersink Filter Replacement Cartridge

    CRE-1 Pentek Undersink Filter Replacement Cartridge

    $23.99
    MSRP: $30.69
    Save 22%
  • ECP5-10 Pentek Undersink Filter Replacement Cartridge

    ECP5-10 Pentek Undersink Filter Replacement Cartridge

    $8.99
    MSRP: $9.42
    Save 5%
  • EP-5 Pentek Replacement Filter Cartridge
  • RS4-DS OmniFilter Whole House Filter Replacement Cartridge (2-Pack)
  • W9222910 Doulton Replacement Ceramic Filter

    W9222910 Doulton Supercarb Replacement Ceramic Filter

    $43.85
    MSRP: $52.73
    Save 17%
  • W9123085 Doulton Imperial UltraCarb Undersink Ceramic Candle Replacement Filter Cartridge
  • W9330958 Doulton SuperCarb Undersink Ceramic Candle Filter System
  • W9121302 Doulton Imperial Supersterasyl Undersink Ceramic Candle Replacement Filter Cartridge
  • W9121202 Doulton AquaCera Supersterasyl Undersink Ceramic Candle Replacement Filter Cartridge
  • W9320007 Doulton Undersink Ceramic Candle Filter Housing

    W9320007 Doulton Undersink Ceramic Candle Filter Housing

    $151.99
    MSRP: $167.57
    Save 9%
  • BGE-3200 BevGuard Water Filter Cartridge

    BGE-3200 BevGuard Water Filter Cartridge

    $75.99
    MSRP: $96.00
    Save 21%
  • BGE-3200S BevGuard Water Filter Cartridge

    BGE-3200S BevGuard Water Filter Cartridge

    $84.99
    MSRP: $107.00
    Save 21%
  • BGE-4200S BevGuard Water Filter Cartridge

    BGE-4200S BevGuard Water Filter Cartridge

    $71.99
    MSRP: $89.99
    Save 20%
  • BGE-4200 BevGuard Water Filter Replacement Cartridge

    BGE-4200 BevGuard Water Filter Replacement Cartridge

    $59.99
    MSRP: $81.00
    Save 26%
  • WQCFU-T-KIT Watts Triple Drinking Water Filtration System w/Kwik-Change Filter Cartridges
  • WHEEDF Whirlpool UltraEase Water Filter Pack

    WHEEDF Whirlpool UltraEase Water Filter Pack

    $47.99
    MSRP: $59.79
    Save 20%
  • E5520-K Omnipure Water Filter

    E5520-K Omnipure Water Filter

    $17.99
    MSRP: $49.99
    Save 64%
  • E5722-P Omnipure Carbon Block Water Filter

    E5722-P Omnipure Carbon Block Water Filter

    $33.99
    MSRP: $49.99
    Save 32%
  • US-UF3 Culligan Ultrafiltration Drinking Water System
  • US-UF3R Culligan Ultrafiltration Replacement Water Filter Cartridge Set
  • 3M Aqua-Pure AP510 Water Filter System

    AP510 3M Aqua-Pure Water Filtration System

    $141.99
    MSRP: $146.04
    Save 3%
  • 3M AquaPure 3MFF101 Whole House Water Filter Cartridge

    3MFF101 3M Aqua-Pure Replacement Water Filter Cartridge

    $200.99
    MSRP: $209.29
    Save 4%
  • WHED20 Whirlpool Undersink Water Filtration System

    WHED20 Whirlpool Undersink Water Filtration System

    $105.99
    MSRP: $124.19
    Save 15%
  • WHER25 Whirlpool Reverse Osmosis Undersink Water Filtration System
  • CQE-RC-04000 Crystal Quest Carbon Block Water Filter Cartridge
  • CQE-RC-04003 Crystal Quest Multi Stage ULTRA Water Filter Cartridge
  • CQE-RC-04006 Crystal Quest Fluoride Water Filter

    CQE-RC-04006 Crystal Quest Fluoride Water Filter

    $47.99
    MSRP: $63.24
    Save 24%
  • CQE-RC-04014 Crystal Quest Carbon Block Water Filter Cartridge
  • CQE-RC-04015 Crystal Quest Reusable Pleated Water Filter

    CQE-RC-04015 Crystal Quest Reusable Pleated Water Filter

    $21.99
    MSRP: $32.19
    Save 32%
  • CQE-RC-04016 Crystal Quest Multi Stage PLUS Water Filter Cartridge
  • CQE-RC-04020 Crystal Quest Nitrate Water Filter Cartridge
  • CQE-RC-04034 Crystal Quest Reusable Pleated Water Filter Cartridge
  • CQE-RC-04035 Crystal Quest Carbon Block Water Filter Cartridge
  • CQE-RC-04036 Crystal Quest Carbon Block Water Filter Cartridge
  • 3M AquaPure 3MFF100 Drinking Water Filter System
  • CQE-US-00313 Crystal Quest Undersink Double Ceramic PLUS Water Filtration System
  • CQE-US-00316 Crystal Quest Undersink Double Fluoride Filtration System
  • CQE-US-00320 Crystal Quest Undersink Triple Arsenic PLUS Filtration System
  • CQE-US-00324 Crystal Quest Undersink Triple Nitrate PLUS Filtration System
  • EV9601-77 Everpure VOC #2 Replacement Filter Cartridge

    EV9601-77 Everpure VOC #2 Replacement Filter Cartridge

    $125.99
    MSRP: $147.19
    Save 14%
  • 20035 Hydrologic 4-Stage Reverse Osmosis Cartridge

    22035 Hydrologic 4-Stage Reverse Osmosis Cartridge

    $128.99
    MSRP: $215.04
    Save 40%
  • CB-45-1001 Hydronix Replacement Whole House Filter Cartridge

Items 193 to 240 of 251 total

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