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.

Items 1 to 48 of 61 total

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  • AMERICAN-PLUMBER-W5CIP

    AMERICAN-PLUMBER-W5CIP

    $21.99
  • AMERICAN-PLUMBER-WCC

    AMERICAN-PLUMBER-WCC

    $19.99
  • AQUAPURE-C-CS-S

    AQUAPURE-C-CS-S

    $37.99
    MSRP: $42.54
    Save 11%
  • AQUAPURE-C-LC

    AQUAPURE-C-LC

    $50.99
    MSRP: $65.54
    Save 22%
  • CB1

    CB1

    $33.99
  • CB3

    CB3

    $50.99
  • CRYSTAL-QUEST-CQE-RC-04002

    CRYSTAL-QUEST-CQE-RC-04002

    $47.99
    MSRP: $65.54
    Save 27%
  • CULLIGAN-D-10-TWIN

    CULLIGAN-D-10-TWIN

    $13.99
    MSRP: $17.93
    Save 22%
  • CULLIGAN-D-15

    CULLIGAN-D-15

    $18.99
    MSRP: $25.29
    Save 25%
  • CULLIGAN-D-20

    CULLIGAN-D-20

    $14.99
  • CULLIGAN-D-250A

    CULLIGAN-D-250A

    $30.99
    MSRP: $39.09
    Save 21%
  • D-28 Culligan Level 1 Undersink Filter Replacement Cartridge
  • CULLIGAN-D-30

    CULLIGAN-D-30

    $24.99
  • CULLIGAN-D-40

    CULLIGAN-D-40

    $33.99
    MSRP: $38.51
    Save 12%
  • NCP-10 Culligan Whole House Filter Replacement Cartridge
  • CULLIGAN-P1-D

    CULLIGAN-P1-D

    $11.99
    MSRP: $12.98
    Save 8%
  • CULLIGAN-P5-D

    CULLIGAN-P5-D

    $11.99
    MSRP: $12.98
    Save 8%
  • CULLIGAN-RWC-5

    CULLIGAN-RWC-5

    $12.99
    MSRP: $17.24
    Save 25%
  • FXSVC GE SmartWater Undersink Filter Set

    FXSVC GE SmartWater Undersink Filter Set

    $60.99
    MSRP: $72.34
    Save 16%
  • FXULC GE SmartWater Undersink Filter Replacement Cartridge

    FXULC GE SmartWater Undersink Filter Replacement Cartridge

    $39.99
    MSRP: $51.74
    Save 23%
  • FXUTC GE SmartWater Undersink Filter Replacement Cartridge
  • FXUVC GE SmartWater Undersink Filter Replacement Cartridge
  • GAC1SS OmniFilter Series C Undersink Filter Replacement Cartridge
  • EPM-10 Pentek Undersink Filter Replacement Cartridge

    EPM-10 Pentek Undersink Filter Replacement Cartridge

    $9.99
    MSRP: $10.57
    Save 5%
  • GAC-10 Pentek Undersink Filter Replacement Cartridge

    GAC-10 Pentek Undersink Filter Replacement Cartridge

    $12.99
    MSRP: $17.99
    Save 28%
  • NCP-10 Pentek Undersink Filter Replacement Cartridge

    NCP-10 Pentek Undersink Filter Replacement Cartridge

    $9.99
    MSRP: $11.95
    Save 16%
  • P-250 Pentek Undersink Filter Set

    P-250 Pentek Undersink Filter Set

    $32.99
    MSRP: $41.99
    Save 21%
  • P-250A Pentek Undersink Filter Set
  • PCC-1 Pentek Undersink Filter Replacement Cartridge

    PCC-1 Pentek Undersink Filter Replacement Cartridge

    $41.99
    MSRP: $53.23
    Save 21%
  • PD-5-934 Pentek Undersink Filter Replacement Cartridge

    PD-5-934 Pentek Undersink Filter Replacement Cartridge

    $9.99
    MSRP: $12.34
    Save 19%
  • TSGAC-10 Pentek Undersink Filter Replacement Cartridge

    TSGAC-10 Pentek Undersink Filter Replacement Cartridge

    $20.99
    MSRP: $24.60
    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
  • WHKF-DB1 Whirlpool Undersink Replacement Filter Cartridge
  • Whirlpool WHKF-GAC Undersink Replacement Water Filter Cartridge

    WHKF-GAC Whirlpool Undersink Replacement Filter Cartridge

    $10.99
    MSRP: $20.34
    Save 46%
  • MATRIKX-1-10 KX Technologies MatrikX Undersink Filter Replacement Cartridge
  • MATRIKX-5-10 KX Technologies MatrikX Undersink Filter Replacement Cartridge
  • MATRIKX-CTO2-10 KX Technologies MatrikX Undersink Filter Replacement Cartridge
  • MATRIKX-Pb1-10 KX Technologies MatrikX Undersink Filter Replacement Cartridge
  • OMB934-1L Omnipure Alpha Series Undersink Filter Replacement Cartridge
  • C1 Pentek Undersink Filter Replacement Cartridge

    Pentek C1 Undersink Water Filter Replacement Cartridge

    $12.99
    MSRP: $15.34
    Save 15%
  • CBR2-10 Pentek Undersink Filter Replacement Cartridge
  • CBR2-10R Pentek Undersink Filter Replacement Cartridge

    CBR2-10R Pentek Undersink Filter Replacement Cartridge

    $18.99
    MSRP: $21.95
    Save 13%
  • CC-10 Pentek Undersink Filter Replacement Cartridge

    CC-10 Pentek Undersink Filter Replacement Cartridge

    $14.99
    MSRP: $15.34
    Save 2%
  • CCBC-10 Pentek Undersink Filter Replacement Cartridge

    CCBC-10 Pentek Undersink Filter Replacement Cartridge

    $18.99
    MSRP: $19.31
    Save 2%
  • CRE-1 Pentek Undersink Filter Replacement Cartridge

    CRE-1 Pentek Undersink Filter Replacement Cartridge

    $23.99
    MSRP: $30.69
    Save 22%

Items 1 to 48 of 61 total

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