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.

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Items 1 to 48 of 203 total

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  • OmniFilter RS12-SS6-05 Polypropylene Sediment Filter

    OmniFilter RS12-SS6-05 Polypropylene Sediment Filter

    $4.99
    MSRP: $11.99
    Save 58%
  • Pentek QC10-CB1R Carbon Block Quick Change Filter
  • 4373529

    4373529

  • 4373574

    4373574

  • 4373575

    4373575

    $61.79
    MSRP: $74.74
    Save 17%
  • AMERICAN-PLUMBER-600R

    AMERICAN-PLUMBER-600R

    $31.99
    MSRP: $35.06
    Save 9%
  • AMERICAN-PLUMBER-DW-2000-RB

    AMERICAN-PLUMBER-DW-2000-RB

    $59.99
    MSRP: $61.28
    Save 2%
  • AMERICAN-PLUMBER-DW-200-R

    AMERICAN-PLUMBER-DW-200-R

    $19.59
    MSRP: $21.15
    Save 7%
  • AMERICAN-PLUMBER-W5CIP

    AMERICAN-PLUMBER-W5CIP

    $21.99
  • AMERICAN-PLUMBER-W5CIP478

    AMERICAN-PLUMBER-W5CIP478

    $16.99
    MSRP: $17.24
    Save 1%
  • AMERICAN-PLUMBER-WCC

    AMERICAN-PLUMBER-WCC

    $19.99
  • AMERICAN-PLUMBER-WGC478

    AMERICAN-PLUMBER-WGC478

    $13.99
    MSRP: $14.94
    Save 6%
  • AMERICAN-PLUMBER-WGCHD

    AMERICAN-PLUMBER-WGCHD

    $34.99
    MSRP: $35.64
    Save 2%
  • AQUAPURE-APC77

    AQUAPURE-APC77

  • AQUAPURE-APC78

    AQUAPURE-APC78

  • TIER1-A101

    TIER1-A101

    $33.99
    MSRP: $49.21
    Save 31%
  • BODY-GLOVE-WI-BG12000C

    BODY-GLOVE-WI-BG12000C

    $290.21
    MSRP: $330.82
    Save 12%
  • BODY-GLOVE-WI-BG3000C

    BODY-GLOVE-WI-BG3000C

    $158.99
    MSRP: $192.95
    Save 18%
  • BODY-GLOVE-WI-BG3000R

    BODY-GLOVE-WI-BG3000R

    $145.99
    MSRP: $174.95
    Save 17%
  • CB1 OmniFilter Undersink Filter Replacement Cartridge

    CB1-SS6-S06 OmniFilter Undersink Water Filter Cartridge

    $34.99
    MSRP: $47.99
    Save 27%
  • CB3 OmniFilter Undersink Filter Replacement Cartridge
  • CB6 OmniFilter Whole House Filter Replacement Cartridge
  • CQE-RC-04002 Crystal Quest PLUS Multi-Stage Replacement Filter Cartridge
  • 1000R-D Culligan Level 3 Undersink RV and Marine Icemaker and Drinking Water Filter
  • 750R-D Culligan Level 1 Undersink RV and Marine Icemaker and Drinking Water Filter
  • D-10-TWIN Culligan Level 1 Undersink Filter Replacement Cartridge (2-Pack)
  • D-15 Culligan Level 1 Undersink Filter Replacement Cartridge (2-Pack)
  • D-20A Culligan Level 1 Undersink Water Filter Replacement Cartridge
  • D-250A Culligan Undersink Filter Replacement Cartridge Set

    D-250A Culligan Undersink Filter Replacement Cartridge Set

    $31.99
    MSRP: $46.99
    Save 32%
  • D-28 Culligan Level 1 Undersink Filter Replacement Cartridge
  • D-30 Culligan Level 2 Undersink Filter Replacement Cartridge
  • D-40 Culligan Level 4 Undersink Water Filter Replacement Cartridge
  • NCP-10 Culligan Whole House Filter Replacement Cartridge
  • P1012581 Culligan Undersink Replacement Filter Cartridge
  • P1-D Culligan Level 4 Whole House Filter Replacement Cartridge (2-Pack)
  • P5-D Culligan Level 4 Whole House Filter Replacement Cartridge (2-Pack)
  • RWC-5 Culligan Level 1 Undersink Filter Replacement Cartridge
  • W9120145 Doulton Replacement Candle Set (6-Pack)

    W9120145 Doulton Replacement Candle Set (6-Pack)

    $106.00
    MSRP: $118.30
    Save 10%
  • W9120562 Doulton Sterasyl Undersink Ceramic Candle Replacement Filter Cartridge
  • W9121020 Doulton Supersterasyl Undersink Ceramic Candle Replacement Filter Cartridge
  • W9121200 Doulton Supersterasyl Undersink Ceramic Candle Replacement Filter Cartridge
  • W9121715 Doulton Supersterasyl Undersink Ceramic Candle Replacement Filter Cartridge
  • W9121750 Doulton Supersterasyl Undersink Ceramic Candle Replacement Filter Cartridge
  • W9123053 Doulton UltraCarb Undersink Ceramic Candle Replacement Filter Cartridge
  • W9142010 Doulton Replacement Ceramic Filter

    W9142010 Doulton Replacement Ceramic Filter

    $17.00
    MSRP: $18.39
    Save 8%
  • W9222900 Doulton Ceramic Water Filter
  • EV9300-15 Everpure proseries 1500 Replacement Filter Cartridge
  • EV9300-25 Everpure proseries 2500 Replacement Filter Cartridge

Items 1 to 48 of 203 total

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