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Water Filtration Systems & Filters

Discount Filter Store carries a wide variety of water filters and filtration systems to make sure that you have clean water everywhere you need it. We offer camping water filters, RV filters, water bottles for travelers on the go. Purify your office or home’s drinking water with countertop filter systems, commercial grade filters, and whole house filter systems. Our filters are protected by our 100% Price Match Guarantee. We are happy to offer you the lowest possible price on our filters, matching any lower price listed by competitors.

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  1. P5-10 Tier1 Sediment Water Filter (12-pack)

    P5-10 Tier1 Sediment Water Filter (12-pack)

    Fits into most industry standard 10-inch water filtration system housings Learn More

    $40.99

  2. P-12 Under Sink Water Replacement Filter Cartridge by Tier1
  3. EP-10 Pentek Comparable Whole House Water Filter by Tier1 (6-Pack)

    EP-10 Pentek Comparable Whole House Water Filter by Tier1 (6-Pack)

    Fits into most industry standard 10 x 2.5-inch water filtration system housings Learn More

    $45.99

  4. EP5-20BB Tier1 Carbon Block Water Filter

    EP5-20BB Tier1 Carbon Block Water Filter

    Fits filtration system housings that accepts 20 x 4.5 inch cartridges Learn More
    $40.99 Retail Price:  $62.09
  5. 3M Aqua-Pure AP110-3C Whole House Water Filter

    AP110-3C 3M Aqua-Pure Water Filter Cartridge

    Sized 30 by 2 5/8 inches Learn More
    $40.99 Retail Price:  $49.44
  6. 3US-AS01 Filtrete Undersink Filter System

    3US-AS01 Filtrete Undersink Filter System

    $41.99 Retail Price:  $50.59
  7. CFB-PLUS20BB Pentek Replacement Water Filter Cartridge

    CFB-PLUS20BB Pentek Replacement Water Filter Cartridge

    Fits into most Big Blue water filtration system housings that accept 20-inch x 4.5-inch filter cartridges Learn More
    $42.99 Retail Price:  $52.89
  8. C-CS-FF 3M Aqua-Pure Undersink Water Filter

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

    Fits the 3M Aqua-Pure Easy Full Flow Drinking Water Filtration System Learn More
    $43.99 Retail Price:  $48.06
  9. DBC-10EX2 Pentek Replacement Filter Cartridge

    DBC-10EX2 Pentek Water Filter Cartridge Replacement

    Fits most Big Blue housings that accept 10-inch x 4.5-inch water filter cartridges Learn More
    $44.99 Retail Price:  $57.95
  10. CFS9720 Cuno Whole House Filter Replacement Cartridge

    CFS9720 Cuno Whole House Filter Replacement Cartridge

    Fits any filtration system that uses the Cuno 9000 Series Replacement Cartridges or the Everpure QL Series filter heads Learn More

    Regular Price: $54.99

    Special Price: $45.05

  11. 47-55708G2 Water Factory Systems Replacement Filter Cartridge

    47-55708G2 Water Factory Systems Replacement Filter Cartridge

    Fits 3M Cuno Water Factory FaucetMATE FM-2-CTO two-stage system Learn More
    $45.99 Retail Price:  $52.89
  12. UDS-10EX1 Pentek Whole House Filter Replacement Cartridge

    UDS-10EX1 Pentek Whole House Filter Replacement Cartridge

    Fits any standard housing that uses 9 3/4-inch x 2 1/2-inch replacement filter cartridges Learn More
    $46.99
  13. WHEEDF Whirlpool UltraEase Water Filter Pack

    WHEEDF Whirlpool UltraEase Water Filter Pack

    Fits the WHED20 Whirlpool dual stage drinking water filtration system Learn More
    $47.99 Retail Price:  $59.79
  14. EFS8002 Everpure Replacement Filter Cartridge

    EFS8002 Everpure Replacement Filter Cartridge

    Fits Cuno 8000 systems Learn More
    $48.99 Retail Price:  $58.64
  15. EP-20BB Pentek Replacement Filter Cartridge

    EP-20BB Pentek Replacement Filter Cartridge

    Fits most Big Blue housings that accept 20-inch x 4.5-inch water filter cartridges Learn More
    $48.99
  16. RWC-5 American Plumber Undersink Filter Replacement Cartridge

    RWC-5 American Plumber Undersink Filter Replacement Cartridge

    Fits most standard size water filter housings Learn More
  17. 4CB5 Everpure Replacement Filter Cartridge

    4CB5 Everpure Replacement Filter Cartridge

    Fits Everpure EV9275, EV9328, EV9337, and EV9797 systems Learn More
    $49.99 Retail Price:  $59.79
  18. EFS8002-S Everpure Replacement Filter Cartridge

    EFS8002-S Everpure Replacement Filter Cartridge

    Fits Cuno 8000 systems Learn More
    $49.99 Retail Price:  $59.79
  19. RS4-DS OmniFilter Whole House Filter Replacement Cartridge (2-Pack)

    RS4-DS OmniFilter Whole House Filter Replacement Cartridge (2-Pack)

    Fits any brand of whole house water filter system that uses standard 9 3/4 x 2 1/2 filter cartridges Learn More
  20. CQE-RC-04036 Crystal Quest Carbon Block Water Filter Cartridge

    CQE-RC-04036 Crystal Quest Carbon Block Water Filter Cartridge

    Fits Crystal Quest countertop, undersink and refrigerator water filtration systems Learn More
    $49.99 Retail Price:  $52.34

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