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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.

45 Item(s)

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  • AP327 3M Aqua-Pure Water Filter Replacement Cartridge
  • DW-200-R American Plumber Undersink Filter Replacement Cartridge
  • W5CIP American Plumber Undersink Filter Replacement Cartridge (2-Pack)
  • W5CIP478 American Plumber Undersink Compact Filter Replacement Cartridge (2-Pack)
  • 3M Aqua-Pure AP217 Under Sink Water Filter
  • 3M Aqua-Pure AP317 Water Filter Replacement Cartridge
  • 3M Aqua-Pure AP410 Water Filter Cartridges
  • 3M Aqua-Pure AP517 Water Filter Replacement Cartridge
  • C-CS-FF 3M Aqua-Pure Undersink Water Filter

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

    $43.99
    MSRP: $48.06
    Save 8%
  • EP35R 3M Aqua-Pure Water Filter Cartridge

    EP35R 3M Aqua-Pure Replacement Water Filter Cartridge

    $115.99
    MSRP: $123.04
    Save 6%
  • D-10-TWIN Culligan Level 1 Undersink Filter Replacement Cartridge (2-Pack)
  • D-15 Culligan Level 1 Undersink Filter Replacement Cartridge (2-Pack)
  • NCP-10 Culligan Whole House Filter Replacement Cartridge
  • P1012581 Culligan Undersink Replacement Filter Cartridge
  • P5-D Culligan Level 4 Whole House Filter Replacement Cartridge (2-Pack)
  • RWC-5 Culligan Level 1 Undersink Filter Replacement Cartridge
  • 3US-AF01 Filtrete Undersink Filter Replacement Cartridge
  • P5-478 Pentek Undersink Filter Replacement Cartridge

    P5-478 Pentek Undersink Filter Replacement Cartridge

    $6.99
    MSRP: $8.15
    Save 14%
  • PD-5-934 Pentek Undersink Filter Replacement Cartridge
  • QC10-EPR Pentek Undersink Quick-Change Replacement Filter Cartridge
  • QC10-TSGACR Pentek Undersink Quick-Change Replacement Filter Cartridge
  • RS2-SS OmniFilter Whole House Filter Replacement Cartridge

    RS2-SS OmniFilter Whole House Water Filter Cartridge

    $6.99
    MSRP: $8.04
    Save 13%
  • 47-55708G2 Water Factory Systems Replacement Filter Cartridge
  • MATRIKX-CTO2-10 KX Technologies MatrikX Undersink Filter Replacement Cartridge
  • 32-250-125-050 KX Technologies Replacement Filter Cartridge
  • C1 Pentek Undersink Filter Replacement Cartridge

    Pentek C1 Undersink Water Filter Replacement Cartridge

    $12.99
    MSRP: $15.34
    Save 15%
  • C2 Pentek Undersink Filter Replacement Cartridge

    C2 Pentek Undersink Filter Replacement Cartridge

    $7.99
    MSRP: $8.84
    Save 10%
  • ECP5-10 Pentek Undersink Filter Replacement Cartridge
  • EP-5 Pentek Replacement Filter Cartridge
  • RS4-DS OmniFilter Whole House Filter Replacement Cartridge (2-Pack)
  • WHEEDF Whirlpool UltraEase Water Filter Pack

    WHEEDF Whirlpool UltraEase Water Filter Pack

    $47.99
    MSRP: $59.79
    Save 20%
  • E5722-P Omnipure Carbon Block Water Filter

    E5722-P Omnipure Carbon Block Water Filter

    $33.99
    MSRP: $49.99
    Save 32%
  • CQE-RC-04000 Crystal Quest Carbon Block Water Filter Cartridge
  • CQE-RC-04014 Crystal Quest Carbon Block Water Filter Cartridge
  • CQE-RC-04015 Crystal Quest Reusable Pleated Water Filter
  • CQE-RC-04020 Crystal Quest Nitrate Water Filter Cartridge
  • CQE-RC-04034 Crystal Quest Reusable Pleated Water Filter Cartridge
  • CQE-RC-04035 Crystal Quest Carbon Block Water Filter Cartridge
  • CQE-RC-04036 Crystal Quest Carbon Block Water Filter Cartridge
  • P-12 Under Sink Water Replacement Filter Cartridge by Tier1
  • WFHDC8001 DuPont Universal Heavy Duty Carbon Wrap 2-Phase Cartridge
  • CMB-510-HF Advanced Water Products 10-inch x 4.5-inch Replacement Sediment Filter

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