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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. CW-MF Pentek Whole House Filter Replacement Cartridge (6-Pack)

    CW-MF Pentek Whole House Filter Replacement Cartridge (6-Pack)

    Fits any standard housing that uses 9 3/4-inch x 2 1/2-inch replacement filter cartridges Learn More

    $40.99

  2. P-12 Under Sink Water Replacement Filter Cartridge by Tier1
  3. EPM-20BB Pentek Comparable Whole House Water Filter by Tier1

    EPM-20BB Pentek Comparable Whole House Water Filter by Tier1

    Fits most standard 20 x 4.5-inch housings Learn More
    $41.99 MSRP:  $47.99
  4. 35430 Brita Grand Pitcher Orange

    35430 Brita Grand Pitcher Orange

    $41.99 MSRP:  $45.99
  5. Pentair NEPP2-40DB Pureflex Pleated Polypropylene Cartridge

    Pentair NEPP2-40DB Pureflex Pleated Polypropylene Cartridge

    Fits standard filter housings that accept 40 x 2.5-inch filters Learn More
    $41.99 MSRP:  $52.99
  6. 200362 Axeon TF-1812-150 Residential Reverse Osmosis Membrane

    200362 Axeon TF-1812-150 Residential Reverse Osmosis Membrane

    Fits standard size 12 x 2 inch RO membrane housings Learn More
    $43.99 MSRP:  $59.99
  7. EPM-20BB Pentek Whole House Filter Cartridge

    EPM-20BB Pentek Whole House Filter Replacement Cartridge

    Fits Pentek 20-inch Big Blue and other heavy-duty filter housings Learn More

    As Low As $43.66 Per Filter

  8. BW60-1812-75 Filmtec Reverse Osmosis Membrane

    BW60-1812-75 Filmtec Reverse Osmosis Membrane

    Fits reverse osmosis systems from various brands Learn More
    $44.99 MSRP:  $47.34
  9. DuPont WFFS150XCH Chrome Counter Top Faucet System
  10. GAC20-BB Pentek Whole House Water Filter

    GAC20-BB Pentek Whole House Filter Replacement Cartridge

    Fits any heavy duty housing that uses 20-inch x 4 1/2-inch replacement filter cartridges Learn More

    As Low As $0.00 Per Filter

  11. EP-20BB Pentek Replacement Water Filter

    EP-20BB Pentek Replacement Filter Cartridge

    Fits most Big Blue housings that accept 20-inch x 4.5-inch water filter cartridges Learn More

    As Low As $40.50 Per Filter

  12. 602733 Viqua Quartz Sleeve for 602806 UV Lamp

    602733 Viqua Quartz Sleeve for 602806 UV Lamp

    For use with Viqua ultraviolet disinfection systems using the 602806 UV lamp Learn More
    $48.99 MSRP:  $64.00
  13. Pentair NEPP12-40DB Pureflex Pleated Polypropylene Cartridge

    Pentair NEPP12-40DB Pureflex Pleated Polypropylene Cartridge

    Fits standard filter housings that accept 40 x 2.5-inch filters Learn More
    $49.99 MSRP:  $61.99
  14. PENTEK-10-212

    PENTEK-10-212

    $47.99 MSRP:  $67.38
  15. Omnipure ELF-10M-P Carbon Block with Polyphosphate

    Omnipure ELF-10M-P Carbon Block with Polyphosphate

    Proprietary design fits Omnipure ELF and E series valve heads Learn More
    $47.99 MSRP:  $50.34
  16. 67300 Aquamira Home Emergency Drinking Water Kit
  17. APHOSF-RC 3M Aqua-Pure High-Output Shower Filter Cartridge

    APHOSF-RC 3M Aqua-Pure High-Output Shower Filter Cartridge

    Fits 3M Aqua-Pure high-output filtered showerheads Learn More
    $40.99 MSRP:  $42.54
  18. 3M Aqua-Pure APIL3R Inline Water Filter
  19. RC-EZ-4 Culligan Level 4 Easy-Change Inline Filter Replacement Cartridge

    RC-EZ-4 Culligan Level 4 Easy-Change Inline Filter Replacement Cartridge

    Fits Culligan Easy-Change filter systems including IC-EZ-4, US-EZ-4, and RV-EZ-4 Learn More
    $40.99 MSRP:  $50.59
  20. EV9608-10 Everpure 2JT Flushing and Sanitizing Cartridge

    EV9608-10 Everpure 2JT Flushing and Sanitizing Cartridge

    Fits Everpure filter heads including models QL1, QL2, QL3, and QL3B Learn More
    $40.99 MSRP:  $49.44
  21. FXHTC GE SmartWater Whole House Filter Replacement Cartridge

    FXHTC GE SmartWater Whole House Filter Replacement Cartridge

    Fits any brand of whole house water filter system that uses standard 9 3/4 x 4 1/2 filter cartridges Learn More
    $40.99 MSRP:  $49.99
  22. VIH-34-PR10 Pentek Whole House Valve-in-Head 10 inch Filter Housing
  23. WATER-FACTORY-SYSTEMS-47-55711G2

    WATER-FACTORY-SYSTEMS-47-55711G2

    $40.99 MSRP:  $52.89
  24. MATRIKX-5-HD10 KX Technologies MatrikX Whole House Filter Replacement Cartridge

    MATRIKX-5-HD10 KX Technologies MatrikX Whole House Filter Replacement Cartridge

    Fits any standard housing that uses 9 3/4-inch x 4 1/2-inch replacement filter cartridges Learn More
  25. 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 MSRP:  $49.44

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