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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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  • AP327 3M Aqua-Pure Water Filter Replacement Cartridge
  • 600R American Plumber Undersink Filter Replacement Cartridge

    600R American Plumber Undersink Water Filter Cartridge

    $31.99 Retail Price:  $35.06
  • WGCHD American Plumber Undersink Water Filter Replacement Cartridge
  • 3M Aqua-Pure AP217 Under Sink Water Filter
  • C-CS-S 3M Aqua-Pure Undersink Water Filter

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

    $37.99 Retail Price:  $42.54
  • A101 Aries Undersink Filter Replacement Cartridge

    A101 Aries Undersink Filter Replacement Cartridge

    $33.99 Retail Price:  $49.21
  • CB1 OmniFilter Undersink Filter Replacement Cartridge
  • D-250A Culligan Undersink Filter Replacement Cartridge Set
  • D-40 Culligan Level 4 Undersink Water Filter Replacement Cartridge
  • W9121750 Doulton Supersterasyl Undersink Ceramic Candle Replacement Filter Cartridge
  • 3US-PF01 Filtrete Undersink Filter Replacement Cartridge

    3US-PF01 Filtrete Undersink Filter Replacement Cartridge

    $35.99 Retail Price:  $43.69
  • 4US-MAXL-F01 Filtrete Replacement Filter Cartridge
  • FQSLF GE SmartWater Undersink Filter Set

    FQSLF GE SmartWater Undersink Filter Set (2 Filters)

    $38.99 Retail Price:  $50.00
  • FXULC GE SmartWater Undersink Filter Replacement Cartridge
  • 47-55707G2 Water Factory Systems Replacement Filter Cartridge
  • Whirlpool WHAB-6009 Replacement Unit A Water Filter Cartridge

    WHAB-6009 Whirlpool Replacement Unit A Filter Cartridge

    $36.99 Retail Price:  $77.99
  • W9121202 Doulton AquaCera Supersterasyl Undersink Ceramic Candle Replacement Filter Cartridge
  • E5722-P Omnipure Carbon Block Water Filter

    E5722-P Omnipure Carbon Block Water Filter

    $33.99 Retail Price:  $49.99
  • CQE-RC-04014 Crystal Quest Carbon Block Water Filter Cartridge
  • CQE-RC-04034 Crystal Quest Reusable Pleated Water Filter Cartridge
  • CQE-RC-04035 Crystal Quest Carbon Block Water Filter Cartridge

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