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Replacement Water Filters: Undersink

Don’t settle for a replacement under sink water filter cartridge that simply fits, find one designed and manufactured specifically for your under sink water filter system.

Discount Filter Store has one of the largest selections of undersink filter cartridges. With under sink filter cartridges available in over 15+ different filter medias, 8+ different sizes (5x2½ - 20x4½), and a wide variety of filter life’s ranging from 250 gallons to 50,000+ gallons, you’re guaranteed to find the under sink water filter system and/or replacement cartridges you need. Choose from hundreds of under sink water filter cartridges from some of the industry’s top brands including American Plumber, Crystal Quest, Pentek®, Culligan®, GE, Aqua-Pure®, Whirlpool®, and more.

Items 145 to 176 of 176 total

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  • 3M AquaPure 3MFF101 Whole House Water Filter Cartridge

    3MFF101 3M Aqua-Pure Replacement Water Filter Cartridge

    $200.99 Retail Price:  $209.29
  • 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 Retail Price:  $63.24
  • 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 Retail Price:  $32.19
  • 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
  • EV9601-77 Everpure VOC #2 Replacement Filter Cartridge

    EV9601-77 Everpure VOC #2 Replacement Filter Cartridge

    $125.99 Retail Price:  $147.19
  • 20035 Hydrologic 4-Stage Reverse Osmosis Cartridge

    22035 Hydrologic 4-Stage Reverse Osmosis Cartridge

    $128.99 Retail Price:  $215.04
  • CB-45-1001 Hydronix Replacement Whole House Filter Cartridge
  • E5620 Omnipure E-Series Everpure Compatible Filter

    E5620 Omnipure E-Series Everpure Compatible Filter

    $18.99 Retail Price:  $36.79
  • P10-5 Tier1 Polypropylene Sediment Filter

    P10-5 Tier1 Polypropylene Sediment Filter

    Regular Price: $3.99

    Special Price: $2.55

  • P-12 Under Sink Water Replacement Filter Cartridge by Tier1
  • P1-5 Tier1 Sediment Filter Cartridge

    P1-5 Tier1 Sediment Filter Cartridge

    Regular Price: $4.99

    Special Price: $2.05

  • RC-0.5 Rainshow’r Replacement Water Filter

    RC-0.5 Rainshow’r Replacement Water Filter

    $92.99 Retail Price:  $115.00
  • BG-1000C Body Glove Replacement Water Filter Cartridge

    BG-1000C Body Glove Replacement Water Filter Cartridge

    $113.96 Retail Price:  $151.95
  • WI-BG6000FFC Body Glove Water Filter Cartridge

    WI-BG6000FFC Body Glove Water Filter Cartridge

    $290.21 Retail Price:  $386.95
  • C2-02 Advanced Water Products 20-inch x 4.5-inch Replacement Carbon Whole House Filter
  • D-25 Culligan Under Sink Water Filter

    D-25 Culligan Under Sink Water Filter

    $11.99 Retail Price:  $16.99
  • CB1-10 Pentek Carbon Block Water Filter Replacement

    CB1-10 Pentek Carbon Block Water Filter Replacement

    $14.99 Retail Price:  $19.99
  • DUPONT-WFQTC90001
  • KX Matrikx CTO2-12 Reverse Osmosis Carbon Block Replacement Filter

Items 145 to 176 of 176 total

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