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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. W25P American Plumber Whole House Sediment Filter Cartridge (2-Pack)

    W25P American Plumber Whole House Sediment Filter Cartridge (2-Pack)

    Fits American Plumber W34-PR, WC34-PR and WVC34 and most standard size water filter housings Learn More
    $13.99 Retail Price:  $16.34
  2. W5CIP American Plumber Undersink Filter Replacement Cartridge (2-Pack)

    W5CIP American Plumber Undersink Filter Replacement Cartridge (2-Pack)

    Fits American Plumber W38-PR and most standard size water filter housings Learn More
    $21.99 Retail Price:  $24.34
  3. W5P American Plumber Whole House Sediment Filter Cartridge (2-Pack)

    W5P American Plumber Whole House Sediment Filter Cartridge (2-Pack)

    Fits American Plumber W34-PR, WC34-PR and WVC34 and most standard size water filter housings Learn More
    $13.99 Retail Price:  $16.34
  4. P1-D Culligan Level 4 Whole House Filter Replacement Cartridge (2-Pack)

    P1-D Culligan Whole House Water Filter Replacement Cartridge (2-Pack)

    Fits Culligan HF-150, HF-160, HF-360 HF-365, and any brand of whole house water filtration system that uses standard 9 3/4 x 2 1/2 filter cartridges Learn More
    $12.99
  5. P5-D Culligan Level 4 Whole House Filter Replacement Cartridge (2-Pack)

    P5-D Culligan Level 4 Whole House Filter Replacement Cartridge (2-Pack)

    Fits Culligan HF-150, HF-160, HF-360, HF-365, and any brand of whole house water filter system that uses standard 9 3/4 x 2 1/2 filter cartridges Learn More
    $12.99 Retail Price:  $15.34
  6. RFC-BBS-D Culligan Level 4 Whole House Filter Replacement Cartridge

    RFC-BBS-D Culligan Level 4 Whole House Filter Replacement Cartridge

    Fits Culligan HD-950, and any brand of whole house water filter system that uses standard 9 3/4 x 4 1/2 filter cartridges Learn More
    $28.99 Retail Price:  $34.60
  7. CFS8812X Cuno Whole House Filter Replacement Cartridge

    CFS8812X Cuno Whole House Filter Replacement Cartridge

    Fits any filtration system that uses the Cuno 8000 Series Replacement Cartridges Learn More
    $72.99
  8. CFS8812X-S Cuno Whole House Filter Replacement Cartridge

    CFS8812X-S Cuno Whole House Filter Replacement Cartridge

    Fits any filtration system that uses the Cuno 8000 Series Replacement Cartridges Learn More
    $74.99 Retail Price:  $77.04
  9. CFS9812X Cuno Whole House Filter Replacement Cartridge

    CFS9812X 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
    $66.99 Retail Price:  $72.09
  10. CFS9812X-S Cuno Whole House Filter Replacement Cartridge

    CFS9812X-S 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
    $65.99 Retail Price:  $78.19
  11. HF20 Cuno Whole House Filter Replacement Cartridge

    HF20 Cuno Whole House Filter Replacement Cartridge

    Fits the Cuno Food Service High Flow Series Models including all SGP, ESP, BREW, BEV, and ICE Systems Learn More

    Regular Price: $64.99

    Special Price: $50.05

  12. HF20-MS Cuno Whole House Filter Replacement Cartridge

    HF20-MS Cuno Whole House Filter Replacement Cartridge

    Fits the Cuno Food Service High Flow Series Models including all SGP, ESP, BREW, BEV, and ICE Systems Learn More
    $73.99
  13. HF20-S Cuno Whole House Filter Replacement Cartridge

    HF20-S Cuno Whole House Filter Replacement Cartridge

    Fits the Cuno Food Service High Flow Series Models including all SGP, ESP, BREW, BEV, and ICE Systems Learn More
    $68.99 Retail Price:  $86.24
  14. PW4040C1027 Desal Ultrafiltration Reverse Osmosis Membrane

    PW4040C1027 Desal Ultrafiltration Reverse Osmosis Membrane

    Fits GE Osmonics pressure vessels and many commercial reverse osmosis systems that accept a 4-inch x 40-inch membrane Learn More
    $999.99 Retail Price:  $1152.29
  15. 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
  16. DEV9108-17 Everpure CostGuard CG5-10S Undersink Filter Replacement Cartridge

    DEV9108-17 Everpure CostGuard CG5-10S Undersink Filter Replacement Cartridge

    Fits Costguard CGS-10, CGS-12, and any brand of water filter system that uses standard 9 3/4 x 2 1/2 filter cartridges Learn More
    $27.99
  17. EV9324-01 Everpure Ice Machine Filter System

    EV9324-01 Everpure Ice Machine Filter System

    Fits standard 3/8-inch water lines Learn More
    $218.99 Retail Price:  $273.69
  18. EV9612-56 Everpure MC2 Replacement Filter Cartridge

    EV9612-56 Everpure MC2 Replacement Filter Cartridge

    Fits Everpure filter heads that use the MC2 system Learn More
    $77.99 Retail Price:  $91.14
  19. EV9617-21 Everpure 4CB5-S Replacement Filter Cartridge

    EV9617-21 Everpure 4CB5-S Replacement Filter Cartridge

    Fits Everpure filter heads including models QL1, QL2, QL3, and QL3B Learn More
    $68.99 Retail Price:  $80.71
  20. EV9617-36 Everpure 4CB5-K Replacement Filter Cartridge

    EV9617-36 Everpure 4CB5-K Replacement Filter Cartridge

    Fits Everpure filter heads including models QL1, QL2, QL3, and QL3B Learn More
    $69.00 Retail Price:  $81.65
  21. i20002 Everpure Replacement Filter Cartridge

    i20002 Everpure Replacement Filter Cartridge

    Fits Everpure Insurice filter systems Learn More
    $74.99 Retail Price:  $88.54
  22. CB-25-1005 Hydronix Replacement Filter Cartridge

    CB-25-1005 Hydronix Replacement Filter Cartridge

    Fits most housings that accept 10-inch x 2.5-inch water filter cartridges Learn More
    $9.99
  23. CB-25-2010 Hydronix Replacement Filter Cartridge

    CB-25-2010 Hydronix Replacement Filter Cartridge

    Fits most housings that accept 20-inch x 2.5-inch water filter cartridges Learn More
    $14.99 Retail Price:  $17.34
  24. GAC-10 Pentek Undersink Filter Replacement Cartridge

    GAC-10 Pentek Undersink Filter Replacement Cartridge

    Fits any standard housing that uses 9 3/4-inch x 2 1/2-inch replacement filter cartridges Learn More
    $12.99
  25. PS1-10C Pentek Whole House Replacement Sediment Filter Cartridge

    PS1-10C Pentek Whole House Replacement Sediment Filter Cartridge

    Fits most standard housings that accept 10-inch x 2.5-inch water filter cartridges Learn More
    $4.99 Retail Price:  $5.28

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