Discount Water Filters and Air Filters at Discount Filter Store.com

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Under Sink Water Filter Replacement Cartridges

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.

18 Item(s)

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  • AMERICAN-PLUMBER-WGCHD

    AMERICAN-PLUMBER-WGCHD

    $34.99
    MSRP: $35.64
    Save 2%
  • CB6

    CB6

    $83.99
  • CRYSTAL-QUEST-CQE-RC-04002

    CRYSTAL-QUEST-CQE-RC-04002

    $47.99
    MSRP: $65.54
    Save 27%
  • GAC-20 Pentek Replacement Filter Cartridge

    GAC-20 Pentek Replacement Filter Cartridge

    $17.99
    MSRP: $23.56
    Save 24%
  • GAC-BB Pentek Replacement Filter Cartridge

    GAC-BB Pentek Replacement Filter Cartridge

    $25.99
    MSRP: $30.51
    Save 15%
  • RS14-DS OmniFilter Whole House Filter Replacement Cartridge (2-Pack)
  • RS2-SS OmniFilter Whole House Filter Replacement Cartridge

    RS2-SS OmniFilter Whole House Water Filter Cartridge

    $6.99
    MSRP: $8.04
    Save 13%
  • RS3-SS OmniFilter Whole House Filter Replacement Cartridge
  • RS7-SS OmniFilter Whole House Filter Replacement Cartridge
  • MATRIKX-1-10 KX Technologies MatrikX Undersink Filter Replacement Cartridge
  • CCBC-10 Pentek Undersink Filter Replacement Cartridge

    CCBC-10 Pentek Undersink Filter Replacement Cartridge

    $18.99
    MSRP: $19.31
    Save 2%
  • RS4-DS OmniFilter Whole House Filter Replacement Cartridge (2-Pack)
  • BEVGUARD-BGE-3200

    BEVGUARD-BGE-3200

    $75.99
    MSRP: $83.33
    Save 9%
  • BEVGUARD-BGE-3200S

    BEVGUARD-BGE-3200S

    $84.99
    MSRP: $91.67
    Save 7%
  • BEVGUARD-BGE-4200S

    BEVGUARD-BGE-4200S

    $71.99
  • BEVGUARD-BGE-4200

    BEVGUARD-BGE-4200

    $59.99
    MSRP: $100.00
    Save 40%
  • CRYSTAL-QUEST-CQE-RC-04003

    CRYSTAL-QUEST-CQE-RC-04003

    $60.05
  • Pentek QC10-CB1R Carbon Block Quick Change Filter

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