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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AP101T 3M Aqua-Pure Whole House Water Filtration System
HD-950 Culligan Whole House Water Filter System
HF-150 Culligan Whole House Filter System
HF-360 Culligan Valve-In-Head Whole House Filter System
CFS01S Cuno Whole House Water Filter Housing
CFS02S Cuno Whole House Water Filter Housing
3WH-HD-S01 3M Filtrete Whole House Sump Filter System
3WH-STD-S01 3M Filtrete Whole House Sump Filter System
4WH-QCTO-S01 3M Filtrete Whole House Water Filtration System
4WH-QS-S01 3M Filtrete Whole House Water Filtration System
HFPP-1-WPR10 Pentek Big Blue Whole House Water Filter Housing (10 x 4.5)
HFPP-112-PR10 Pentek Big Blue Whole House 10 inch Filter Housing
HFPP-34-PR-10 Pentek Big Blue Whole House 10 inch Filter Housing
HFPP-1-PR10 Pentek Big Blue Whole House 10 inch Filter Housing
STANDARD-34-PR-10 Pentek Whole House Water Filtration System Housing (10 Inch)
WHKF-DWHBB Whirlpool Filter Housing with Pressure Relief Valve - Clear
BBFS-222 Pentek Three Housing Filter System
BFS-201 Pentek Slim Line Filter Housing with Pressure Relief Valve
BIG-CLEAR-LX-10 Pentek Big Clear Whole House 10 inch Filter Housing
14x30x1 Merv 8 Universal Air Filter By Tier1 (6-Pack)
W20FFPH1CBPR Watts Flowmatic Big Clear Whole House Water Filter Housing
W10FFPH1CBPR Watts Full Flow Whole House Water Filter Housing
AP802 3M Aqua-Pure Whole House Water Filtration System
AP11T 3M Aqua-Pure Whole House Water Filtration System
SST1HA 3M Aqua-Pure Stainless Steel Water Filtration System Housing
OB1-S-S06 OmniFilter Undersink Water Filter System
AF-10-1053 Aries Specialty Cartridge 10-inch x 2.5-inch Hydrogen Sulfide Removal
AF-10-2011 Aries Specialty Cartridge 10-inch x 2.5-inch 1 LBS KDF/GAC
150564 Pentek Whole House Water Filter System (Clear/ Blue)
22120 Hydrologic Stealth RO 100GPD Membrane
Pentek 158599 Clear 3G Slim Line Filter Housing
Pentek 158637 Clear 3G Slim Line Filter Housing with Pressure Relief
RFC-93 Pentek Radial Flow Carbon Water Filter Cartridge
Pentek 150236 Big Blue Heavy Duty Filter Housing
Pentek 158214 Clear Traditional Slim Line Filter Housing
WB-HB-20-20W Harmsco Pleated Commercial Water Filter Cartridge
WB-HB-20-50W Harmsco Pleated Commercial Water Filter Cartridge
150240 Pentek 10-inch Big Blue Housing
AWP117 Viqua Carbon Block Filter for S2Q-DWS UV System
Aries AF-10-2054 Coconut Granular Activated Carbon
Aries AF-10-2115 KDF/Granular Activated Carbon
Viqua VT4-DWS11 Ultraviolet Filtration System

32 Item(s)

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  • W5CIP478 American Plumber Undersink Compact Filter Replacement Cartridge (2-Pack)
  • WCC American Plumber Undersink Filter Replacement Cartridge

    WCC American Plumber Undersink Filter Replacement Cartridge

    $19.99
    MSRP: $26.44
    Save 24%
  • WGC478 American Plumber Undersink Compact Filter Replacement Cartridge
  • CB1 OmniFilter Undersink Filter Replacement Cartridge

    CB1-SS6-S06 OmniFilter Undersink Water Filter Cartridge

    $34.99
    MSRP: $47.99
    Save 27%
  • NCP-10 Culligan Whole House 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
  • W9142010 Doulton Replacement DCB10 Carbon Block

    W9142010 Doulton Replacement DCB10 Carbon Block

    $17.00
    MSRP: $18.39
    Save 8%
  • FXUTC GE SmartWater Undersink Filter Replacement Cartridge

    FXUTC GE SmartWater Undersink Filter Replacement Cartridge

    $23.69
    MSRP: $35.99
    Save 34%
  • 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: $13.99
    Save 29%
  • GAC-10 Pentek Undersink Filter Replacement Cartridge

    GAC-10 Pentek Undersink Filter Replacement Cartridge

    $14.99
    MSRP: $19.99
    Save 25%
  • TSGAC-10 Pentek Undersink Filter Replacement Cartridge

    TSGAC-10 Pentek Undersink Filter Replacement Cartridge

    $20.99
    MSRP: $24.60
    Save 15%
  • WHKF-DB1 Whirlpool Undersink Replacement Filter Cartridge
  • Whirlpool WHKF-DB2 Undersink Replacement Water Filter Cartridge
  • F-601R InSinkErator Instant Hot Water Dispenser Replacement Filter Cartridge (2-Pack)
  • 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
  • CBC-5 Pentek Undersink Filter Replacement Cartridge

    CBC-5 Pentek Undersink Filter Replacement Cartridge

    $10.29
    MSRP: $15.99
    Save 36%
  • CBR2-10 Pentek Undersink Filter Replacement Cartridge
  • CC-10 Pentek Undersink Filter Replacement Cartridge

    CC-10 Pentek Undersink Filter Replacement Cartridge

    $15.39
    MSRP: $21.99
    Save 30%
  • CCBC-10 Pentek Undersink Filter Replacement Cartridge

    CCBC-10 Pentek Undersink Filter Replacement Cartridge

    $19.59
    MSRP: $27.99
    Save 30%
  • CRE-1 Pentek Undersink Filter Replacement Cartridge

    CRE-1 Pentek Undersink Filter Replacement Cartridge

    $24.69
    MSRP: $34.99
    Save 29%
  • W9121302 Doulton Imperial Supersterasyl Undersink Ceramic Candle Replacement Filter Cartridge
  • W9121202 Doulton AquaCera Supersterasyl Undersink Ceramic Candle Replacement Filter Cartridge
  • D-25 Culligan Comparable Undersink Replacement Cartridge by Tier1
  • WCC American Plumber Comparable UndersinkReplacement Cartridge by Tier1
  • CC-10 Pentek Comparable Undersink Replacement Cartridge by Tier1
  • GAC1SS Omnifilter Comparable Undersink Replacement Cartridge by Tier1

32 Item(s)

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