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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. S1-20BB Pentek Comparable Whole House Water Filter by Tier1

    S1-20BB Pentek Comparable Whole House Water Filter by Tier1

    Fits PENTEK S1-20BB, American Plumber W20CLHD20 and 155305 Learn More
    $17.99 Retail Price:  $26.99
  2. R30-20BB Pentek Comparable Whole House Sediment Water Filter by Tier1

    R30-20BB Pentek Comparable Whole House Sediment Water Filter by Tier1

    Fits many styles of water filter housings that accept 20 x 5-inch filters Learn More
    $20.99
  3. 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
  4. 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
  5. NCP-20BB Pentek Whole House Filter Replacement

    NCP-20BB Pentek Whole House Filter Replacement Cartridge

    Fits Pentek Big Blue and most standard 20-inch heavy duty housings that use 20-inch x 4 1/2-inch replacement filter cartridges Learn More

    As Low As $33.33 Per Filter

  6. 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
    $36.99 Retail Price:  $49.44
  7. MATRIKX-1-HD20 KX Technologies MatrikX Whole House Filter Replacement Cartridge

    MATRIKX-1-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
    $102.99
  8. 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
  9. 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
    $70.99
  10. MATRIKX-Pb1-HD20 KX Technologies MatrikX Whole House Filter Replacement Cartridge

    MATRIKX-Pb1-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
    $127.99
  11. CRFC-20BB Pentek Chloramine Reduction Water Filter

    CRFC-20BB Pentek Chloramine Reduction Water Filter

    Fits most Big Blue housings that accept 20-inch x 4.5-inch water filter cartridges Learn More
    $109.99 Retail Price:  $156.27
  12. FXB20RFL Filtrex Green Radial Flow Water Filter Cartridges

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