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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.

39 Item(s)

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  • AP327 3M Aqua-Pure Water Filter Replacement Cartridge
  • DW-2000-RB American Plumber Replacement Filter Cartridge

    DW-2000-RB American Plumber Replacement Filter Cartridge

    $59.99 Retail Price:  $61.28
  • DW-200-R American Plumber Undersink Filter Replacement Cartridge
  • 3M Aqua-Pure AP22 Under Sink Water Filter
  • 3M Aqua-Pure AP317 Water Filter Replacement Cartridge
  • 3M Aqua-Pure AP517 Water Filter Replacement Cartridge
  • 3M Aqua-Pure AP-DW85 Water Filter Replacement Cartridge
  • C-CS-FF 3M Aqua-Pure Undersink Water Filter

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

    $43.99 Retail Price:  $48.06
  • C-CYST-FF 3M Aqua-Pure Undersink Water Filter

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

    $52.99 Retail Price:  $56.34
  • WI-BG12000C Body Glove Replacement Filter Cartridge

    WI-BG12000C Body Glove Replacement Filter Cartridge

    $290.21 Retail Price:  $386.95
  • CB1 OmniFilter Undersink Filter Replacement Cartridge
  • D-20A Culligan Level 1 Undersink Water Filter Replacement Cartridge
  • D-28 Culligan Level 1 Undersink Filter Replacement Cartridge
  • D-30 Culligan Level 2 Undersink Filter Replacement Cartridge
  • P1012581 Culligan Undersink Replacement Filter Cartridge
  • W9222900 Doulton Ceramic Water Filter
  • EV9300-25 Everpure proseries 2500 Replacement Filter Cartridge
  • 3US-AF01 Filtrete Undersink Filter Replacement Cartridge

    3US-AF01 Filtrete Undersink Filter Replacement Cartridge

    $21.99 Retail Price:  $23.99
  • 3US-PF01 Filtrete Undersink Filter Replacement Cartridge

    3US-PF01 Filtrete Undersink Filter Replacement Cartridge

    $35.99 Retail Price:  $43.69
  • FQSLF GE SmartWater Undersink Filter Set

    FQSLF GE SmartWater Undersink Filter Set (2 Filters)

    $38.99 Retail Price:  $50.00
  • GAC1SS OmniFilter Series C Undersink Filter Replacement Cartridge
  • GXULQR GE Undersink Water Filter Replacement Cartridge
  • P-250 Pentek Undersink Filter Set

    P-250 Pentek Undersink Filter Set

    $23.99 Retail Price:  $28.99
  • QC10-EPR Pentek Undersink Quick-Change Replacement Filter Cartridge
  • QC10-TSGACR Pentek Undersink Quick-Change Replacement Filter Cartridge
  • TSGAC-10 Pentek Undersink Filter Replacement Cartridge

    TSGAC-10 Pentek Undersink Filter Replacement Cartridge

    $20.99 Retail Price:  $24.60
  • 47-5574704 Water Factory Systems FaucetMATE Carbon Block Filter
  • Whirlpool WHAB-6009 Replacement Unit A Water Filter Cartridge

    WHAB-6009 Whirlpool Replacement Unit A Filter Cartridge

    $36.99 Retail Price:  $77.99
  • Whirlpool WHAB-6010 Replacement Unit B Filter Cartridge

    WHAB-6010 Whirlpool Replacement Unit B Filter Cartridge

    $48.99 Retail Price:  $62.09
  • WHKF-DB1 Whirlpool Undersink Replacement Filter Cartridge
  • Whirlpool WHKF-GAC Undersink Replacement Water Filter Cartridge
  • K-201 Kohler Undersink Replacement Filter Cartridge

    K-201 Kohler Undersink Water Filter Cartridge Replacement

    $96.99 Retail Price:  $132.60
  • K-202 Kohler Undersink Replacement Filter Cartridge

    K-202 Kohler Undersink Water Filter Cartridge

    $122.99 Retail Price:  $173.40
  • C2 Pentek Undersink Filter Replacement Cartridge

    C2 Pentek Undersink Filter Replacement Cartridge

    $7.99 Retail Price:  $8.84
  • EP-5 Pentek Replacement Filter Cartridge
  • W9222910 Doulton Replacement Ceramic Filter

    W9222910 Doulton Supercarb Replacement Ceramic Filter

    $43.85 Retail Price:  $52.73
  • E5520-K Omnipure Water Filter

    E5520-K Omnipure Water Filter

    $17.99 Retail Price:  $49.99
  • E5722-P Omnipure Carbon Block Water Filter

    E5722-P Omnipure Carbon Block Water Filter

    $33.99 Retail Price:  $49.99
  • CB1-10 Pentek Carbon Block Water Filter Replacement

    CB1-10 Pentek Carbon Block Water Filter Replacement

    $14.99 Retail Price:  $19.99

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