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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. 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 Retail Price:  $47.99
  2. RS6 OmniFilter Comparable Whole House Water Filter by Tier1

    RS6 OmniFilter Comparable Whole House Water Filter by Tier1

    Fits OmniFilter RS6, OmniFilter RS6-R-01, OmniFilter RS6-R-02 and most standard 10-inch housings Learn More
    $15.99 Retail Price:  $17.99
  3. WFHD13001B DuPont Universal Heavy Duty Whole House Filtration System

    WFHD13001B DuPont Universal Heavy Duty Whole House Filtration System

    Fits standard 10 inch by 4.5 inch filter cartridges Learn More
  4. WFHDC3001 DuPont Universal Heavy Duty Pleated Poly Whole House Cartridge

    WFHDC3001 DuPont Universal Heavy Duty Pleated Poly Whole House Cartridge

    Fits WFHD13001B Universal Heavy Duty Whole House Filtration System and other brands of 10x4.5-inch filter systems Learn More
  5. WFHDC8001 DuPont Universal Heavy Duty Carbon Wrap 2-Phase Cartridge

    WFHDC8001 DuPont Universal Heavy Duty Carbon Wrap 2-Phase Cartridge

    Fits WFHD13001B Universal Heavy Duty Whole House Filtration System and other brands of 10x4.5-inch filter systems Learn More
  6. C2-02 Advanced Water Products 20-inch x 4.5-inch Replacement Carbon Whole House Filter

    C2-02 Advanced Water Products Replacement 20-inch x 4.5-inch Carbon Whole House Filter

    Fits most 20-inch x 4.5-inch filter housings, including the Trojan UV Max IHS12-D4 and IHS22-D4 Water Disinfection Systems Learn More
    $54.99 Retail Price:  $89.00
  7. C2-02 Viqua Carbon Whole House Filter

    C2-02 Viqua Carbon Whole House Filter

    Fits most 20 x 4.5-inch filter housings including the Viqua IHS12-D4 and IHS22-D4 water disinfection systems. Learn More
    $54.99 Retail Price:  $89.00
  8. BF7-S-06 OmniFilter Undersink Filter System

    BF7-S-06 OmniFilter Undersink Filter System

    $81.99 Retail Price:  $85.99
  9. 3M Aqua-Pure AP817 Whole House Water Filter Cartridge

    AP817 3M Aqua-Pure 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
    $49.99
  10. HF40-S Cuno Whole House Filter Replacement Cartridge

    HF40-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
    $105.99 Retail Price:  $123.04
  11. HF45-S Cuno Whole House Filter Replacement Cartridge

    HF45-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
    $103.99 Retail Price:  $120.39
  12. HF60-S Cuno Whole House Filter Replacement Cartridge

    HF60-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
    $138.99 Retail Price:  $160.99
  13. HF65 Cuno Whole House Filter Replacement Cartridge

    HF65 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
    $127.99 Retail Price:  $148.80
  14. HF65-S Cuno Whole House Filter Replacement Cartridge

    HF65-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

    Regular Price: $133.99

    Special Price: $112.05

  15. 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
    $41.99 Retail Price:  $42.54
  16. 22006 Hydrologic BigBoy Replacement Carbon Filter - Green

    22006 Hydrologic BigBoy Carbon Filter (Green)

    Regular Price: $80.99

    Special Price: $45.05

  17. CB-45-2010 Hydronix Replacement Filter Cartridge

    CB-45-2010 Hydronix Replacement Filter Cartridge

    Fits most Big Blue housings that accept 20-inch x 4.5-inch water filter cartridges Learn More
    $43.99 Retail Price:  $49.44
  18. CFBC-20 Pentek Replacement Filter Cartridge

    CFBC-20 Pentek Replacement Water Filter Cartridge

    Fits into most standard water filtration system housings that accept 20-inch x 2.5-inch cartridges Learn More
    $23.49 Retail Price:  $29.31
  19. EPM-20BB Pentek Whole House Filter Replacement Cartridge

    EPM-20BB Pentek Whole House Filter Replacement Cartridge

    Fits Pentek 20-inch Big Blue and other heavy-duty filter housings Learn More
    $44.99 Retail Price:  $54.04
  20. FLOPLUS-10BB Pentek Replacement Filter Cartridge

    FLOPLUS-10BB Pentek Replacement Filter Cartridge

    Fits most Big Blue housings that accept 10-inch x 4.5-inch water filter cartridges Learn More
    $45.99 Retail Price:  $48.52
  21. GAC20-BB Pentek Whole House Filter Replacement Cartridge

    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
    $45.99 Retail Price:  $56.80
  22. RFC-BB Pentek Whole House Filter Replacement Cartridge - 1

    RFC-BB Pentek Whole House Water Filter Cartridge Replacement

    Fits water filtration system housings by Pentek, Culligan, Pentair, Ametek, US Filter, Kleen Plus, Bruner, American Plumber, Plymouth and more that accept 9-3/4 x 4-1/2 inch filter cartridges Learn More
    $30.99 Retail Price:  $35.64
  23. GK-1 Rainshowr Green Knight Hydroponic Dechlorinator

    GK-1 Rainshowr Green Knight Hydroponic Dechlorinator

    Fits hydroponic garden hoses. Learn More

    Regular Price: $64.99

    Special Price: $57.05

  24. RS6 OmniFilter Whole House Filter Replacement Cartridge

    RS6-SS2-S06 OmniFilter Whole House Water Filter Cartridge

    Fits any brand of heavy duty whole house water filtration system that uses standard 9 3/4 x 4 1/2 filter cartridges Learn More
    $18.99 Retail Price:  $21.34
  25. SF100 OmniFilter Shower-Soft Inline Shower Filter

    SF100 OmniFilter Shower-Soft Inline Shower Filter

    Built to fit onto any standard 1/2-inch threaded shower arm Learn More
    $29.99 Retail Price:  $35.64

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