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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.

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  1. FXSLC GE SmartSetWater Undersink Filter

    FXSLC GE SmartWater Undersink Filter Set

    Fits any brand of undersink water filter system that uses standard 9 3/4 x 2 1/2 filter cartridges Learn More
  2. DUPONT-WFQTC90001

    DuPont WFQTC90001 Quick Twist 3rd Stage Replacement Filter

    Fits the Dupont-WFQT39000 Quick Twist Water Filter System Learn More
  3. BGE-4200S BevGuard Water Filter Cartridge

    BGE-4200S BevGuard Water Filter Cartridge

    For use in systems that use the Everpure 4C, H-54, H-104, H-300, MD-CN, PBS-400, S-100, S-101 and SPA 4002 water filters Learn More
    $71.99 Retail Price:  $89.99
  4. BGE-3200S BevGuard Water Filter Cartridge

    BGE-3200S BevGuard Water Filter Cartridge

    For use in systems that use Everpure 4H, 4K Plus, H-100, H-200, H-300+M, H-1200, MD-HN, OW 200L, OW4-Plus and S-200 water filters Learn More
    $84.99 Retail Price:  $107.00
  5. BGE-3200 BevGuard Water Filter Cartridge

    BGE-3200 BevGuard Water Filter Cartridge

    Built for use in systems that use the 3M/Cuno CFS 8112-EL 55817-27 and CFS 8812-ELX 56011-03 filters. Learn More
    $75.99 Retail Price:  $96.00
  6. CQE-RC-04016 Crystal Quest Multi Stage PLUS Water Filter Cartridge

    CQE-RC-04016 Crystal Quest Multi Stage PLUS Water Filter Cartridge

    For use primarily in Crystal Quest low flow countertop and undersink filtration systems. Also fits select refrigerator water filtration systems. Sized 2 7/8 inches by 20 inches. Learn More
    $138.99 Retail Price:  $178.24
  7. CQE-RC-04003 Crystal Quest Multi Stage ULTRA Water Filter Cartridge

    CQE-RC-04003 Crystal Quest Multi Stage ULTRA Water Filter Cartridge

    Fits Crystal Quest countertop, undersink and refrigerator water filtration systems Learn More
    $64.99 Retail Price:  $91.99
  8. CB6 OmniFilter Whole House Filter Replacement Cartridge

    CB6 OmniFilter Whole House Water Filter Cartridge

    Fits any brand of whole house water filtration system that uses 9 3/4 x 4 1/2 water filter cartridges Learn More
    $83.99
  9. 4373574 Whirlpool Undersink Filter Kit

    4373574 Whirlpool Undersink Filter Kit

    Fits Whirlpool WSC300 and WSC200 filter systems Learn More
    $156.99 Retail Price:  $159.34

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