Discount Water Filters and Air Filters at Discount Filter

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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.

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15 Item(s)

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  • W5CIP478 American Plumber Undersink Compact Filter Replacement Cartridge (2-Pack)
  • 750R-D Culligan Level 1 Undersink RV and Marine Icemaker and Drinking Water Filter
  • W9120562 Doulton Sterasyl Undersink Ceramic Candle Replacement Filter Cartridge
  • FXUTC GE SmartWater Undersink Filter Replacement Cartridge

    FXUTC GE SmartWater Undersink Filter Replacement Cartridge

    MSRP: $35.99
    Save 34%


    MSRP: $13.99
    Save 29%
  • QC10-GACR Pentek Undersink Quick-Change Replacement Filter Cartridge
  • 47-55708G2 Water Factory Systems Replacement Filter Cartridge
  • MATRIKX-Pb1-10 KX Technologies MatrikX Undersink Filter Replacement Cartridge


    MSRP: $21.38
    Save 21%


    MSRP: $19.99
    Save 25%


    MSRP: $16.55
    Save 38%
  • OMNIPURE-E5620


    MSRP: $36.79
    Save 45%
  • KX Matrikx CTO2-12 Reverse Osmosis Carbon Block Replacement Filter
  • GAC-20 Pentek Comparable Granular Activated Carbon Water Filter by Tier1
  • RFC-93 Whole House Filter Replacement Cartridge by Tier1

15 Item(s)

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