Discount Water Filters and Air Filters at Discount Filter Store.com

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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
    $36.99 MSRP:  $48.99
  2. 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
    $62.99 MSRP:  $79.96
  3. 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
    $17.99 MSRP:  $27.04
  4. 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
    $25.99 MSRP:  $32.92
  5. 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
  6. 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
    $49.99 MSRP:  $89.00
  7. 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 $63.08 Per Filter

  8. 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

  9. 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

  10. CB6 OmniFilter Comparable Whole House Carbon Water Filter by Tier1

    CB6 OmniFilter Comparable Whole House Carbon Water Filter by Tier1

    Fits filtration system housings that accepts 10 x 4.5 inch cartridges Learn More

    As Low As $0.00 Per Filter

  11. KX-MATRIKX-1-HD10 KX Matrikx Comparable Whole House Carbon Water Filter By Tier1

    KX-MATRIKX-1-HD10 KX Matrikx Comparable Whole House Carbon Water Filter By Tier1

    Fits filtration system housings that accepts 10 x 4.5 inch cartridges Learn More

    As Low As $0.00 Per Filter

  12. FLOPLUS-10BB Pentek Comparable Whole House Carbon Water Filter by Tier1

    FLOPLUS-10BB Pentek Comparable Whole House Carbon Water Filter by Tier1

    Fits filtration system housings that accepts 10 x 4.5 inch cartridges Learn More

    As Low As $0.00 Per Filter

  13. KX-MATRIKX-1-20 Matrikx Comparable Whole House Carbon Water Filter by Tier1

    KX-MATRIKX-1-20 Matrikx Comparable Whole House Carbon Water Filter by Tier1

    Fits filtration system housings that accepts 20 x 2.5 inch cartridges Learn More

    As Low As $0.00 Per Filter

  14. CR1-20 KX MatrikX Comparable Whole House Carbon Water Filter by Tier1

    CR1-20 KX MatrikX Comparable Whole House Carbon Water Filter by Tier1

    Fits filtration system housings that accepts 20 x 2.5 inch cartridges Learn More

    As Low As $0.00 Per Filter

  15. CHLORPLUS-20 Pentek Comparable Whole House Carbon Water Filter by Tier1

    CHLORPLUS-20 Pentek Comparable Whole House Carbon Water Filter by Tier1

    Fits filtration system housings that accepts 20 x 2.5 inch cartridges Learn More

    As Low As $0.00 Per Filter

  16. FLOPLUS-20 Pentek Comparable Whole House Carbon Water Filter by Tier1

    FLOPLUS-20 Pentek Comparable Whole House Carbon Water Filter by Tier1

    Fits filtration system housings that accepts 20 x 2.5 inch cartridges Learn More

    As Low As $0.00 Per Filter

  17. 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

    As Low As $0.00 Per Filter

  18. 22006 Hydrologic BigBoy Replacement Carbon Filter - Green
  19. 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
    $46.99 MSRP:  $58.99
  20. 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 MSRP:  $29.31
  21. 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
    $44.99 MSRP:  $48.52
  22. MATRIKX-5-HD20 KX Technologies MatrikX Whole House Filter Replacement Cartridge

    MATRIKX-5-HD20 KX Technologies MatrikX Whole House Filter Replacement Cartridge

    Fits any standard housing that uses 20-inch x 4 1/2-inch replacement filter cartridges Learn More
  23. CBC-20 Pentek Replacement Filter Cartridge

    CBC-20 Pentek Replacement Filter Cartridge

    Fits most housings that accept 20-inch x 2.5-inch water filter cartridges Learn More
    $32.77
  24. CBC-10BB-WF Tier1 Water Filter Cartridge

    CBC-BB Pentek Comparable Water Filter Cartridge by Tier1

    Fits filtration system housings that accepts 10 x 4.5 inch cartridges Learn More
    $42.99 MSRP:  $60.59
  25. CBC-20 Tier1 Water Filter Cartridge

    CBC-20 Tier1 Water Filter Cartridge

    Fits filtration system housings that accepts 20 x 2.5 inch cartridges Learn More
    $25.99 MSRP:  $32.77

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