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. CMB-520-HF Advanced Water Products 20-inch x 4.5-inch Replacement Sediment Filter

    Advanced Water Products CMB-520-HF Whole House Filter for IHS22-D4 System

    Made for the Trojan UV Max IHS22-D4 Water Disinfection System Learn More
  2. 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
  3. 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
  4. CMB-520-HF Viqua Sediment Whole House Filter

    CMB-520-HF Viqua Sediment Whole House Filter

    Fits most 20 x 4.5-inch filter housings including the Viqua IHS22-D4 water disinfection system Learn More
    $27.99 MSRP:  $39.00
  5. Hydronix SDC-45-2005 Whole House Sediment Filter Cartridge

    SDC-45-2005 Hydronix Whole House Replacement Sediment Filter Cartridge

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

    As Low As $18.66 Per Filter

  6. DGD-5005-20 Pentek Whole House Water Filter

    DGD-5005-20 Pentek Whole House Filter Replacement Cartridge

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

    As Low As $23.00 Per Filter

  7. ECP5-20BB Pentek Whole House Filter Cartridge

    Pentek ECP5-20BB Whole House Pleated Cellulose/Polyester Water Filter Replacement Cartridge

    Fits Pentek 20-inch Big Blue and any standard housing that uses 20-inch x 4 1/2-inch replacement filter cartridges Learn More

    As Low As $21.67 Per Filter

  8. 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

  9. P5-20BB Tier1 Sediment Water Filter

    P5-20BB Tier1 Whole House Sediment Water Filter

    Fits filtration system housings that accept 20 x 4.5 inch cartridges Learn More

    As Low As $14.33 Per Filter

  10. ECP5-20BB Pentek Comparable Whole House Sediment Water Filter by Tier1

    ECP5-20BB Pentek Comparable Whole House Sediment Water Filter by Tier1

    Fits most 20 x 5-inch filter housings Learn More

    As Low As $14.94 Per Filter

  11. 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

    As Low As $45.83 Per Filter

  12. ECP5-20BB Pentek Comparable Whole House Sediment Water Filter by Tier1

    ECP5-20BB Pentek Comparable Whole House Sediment Water Filter by Tier1

    Fits most 20 x 5-inch filter housings Learn More

    As Low As $20.33 Per Filter

  13. SPC-45-2005 Hydronix Comparable Whole House Sediment Water Filter by Tier1

    SPC-45-2005 Hydronix Comparable Whole House Sediment Water Filter by Tier1

    Fits most 20 x 5-inch filter housings Learn More

    As Low As $0.00 Per Filter

  14. SPC-45-2010 Hydronix Comparable Whole House Sediment Water Filter by Tier1

    SPC-45-2010 Hydronix Comparable Whole House Sediment Water Filter by Tier1

    Fits most 20 x 5-inch filter housings Learn More

    As Low As $0.00 Per Filter

  15. 3M Aqua-Pure AP810-2 Whole House Water Filter Cartridge

    AP810-2 3M Aqua-Pure Whole House Filter Replacement Cartridge

    Fits 3M Aqua-Pure whole house water filter systems Learn More
    $52.99 MSRP:  $84.20
  16. 3M Aqua-Pure AP815-2 Whole House Water Filter

    AP815-2 3M Aqua-Pure Whole House Filter Replacement Cartridge

    Fits 3M Aqua-Pure whole house water filter systems Learn More
  17. P1012581 Culligan Undersink Replacement Filter Cartridge

    P1012581 Culligan Undersink Replacement Filter Cartridge

    Fits the Culligan 201 Under Sink Water Filter System Learn More
  18. HB-20-5W Harmsco Calypso Blue Replacement Filter Cartridge

    HB-20-5W Harmsco Calypso Blue Replacement Filter Cartridge

    Fits any industry standard housing that accepts 4.5-inch by 20-inch replacement filters. Learn More
    $31.99 MSRP:  $36.79
  19. 22070 Hydrologic BigBoy Replacement Carbon Filter

    22070 Hydrologic BigBoy Replacement Carbon Filter

    Fits into water filtration housing systems that accept 20 x 4.5 inch filter cartridges Learn More
    $88.99 MSRP:  $123.04
  20. SPC-45-2005 Hydronix Whole House Replacement Sediment Filter Cartridge

    SPC-45-2005 Hydronix Whole House Replacement Sediment Filter Cartridge

    Fits most Big Blue housings that accept 20-inch x 4.5-inch water filter cartridges Learn More
    $21.99 MSRP:  $29.89
  21. WP5BB20P Pentek Replacement Filter Cartridge

    WP5BB20P Pentek Replacement Filter Cartridge

    Fits most Big Blue housings that accept 20-inch x 4.5-inch water filter cartridges Learn More
    $34.99 MSRP:  $42.54
  22. MAXETW-FF20 Watts C-MAX Whole House Replacement Filter Cartridge

    MAXETW-FF20 Watts C-MAX Whole House Water Filter Cartridge

    Fits 20-inch x 4.5-inch water filtration system housings Learn More
    $68.99 MSRP:  $74.74
  23. MATRIKX-CTO2-HD20 KX Technologies MatrikX Whole House Filter Replacement Cartridge

    MATRIKX-CTO2-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
    $68.99 MSRP:  $69.29
  24. 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 MSRP:  $52.89
  25. SWC-45-2005 Hydronix String-Wound Sediment Water Filter

    SWC-45-2005 Hydronix String-Wound Sediment Water Filter

    20 inches by 4.5 inches, 5 micron. Fits into most 20-inch Big Blue water filtration housings and replaces Liquatec SWF-45-2005, Pentek 355223-43 and Watts SF5-20-425 water filters Learn More
    $24.99 MSRP:  $26.44

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