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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. CHLORPLUS-10 Pentek Whole House Filter Replacement Cartridge (12-Pack)

    CHLORPLUS-10 Pentek Whole House Filter Replacement Cartridge (12-Pack)

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

    $215.99

  2. CW-MF Pentek Whole House Filter Replacement Cartridge (30-Pack)

    CW-MF Pentek Whole House Filter Replacement Cartridge (30-Pack)

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

    $167.99

  3. 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

  4. ECP5-BB Pentek Whole House Filter Replacement Cartridge (12-Pack)

    ECP5-BB Pentek Whole House Filter Replacement Cartridge (12-Pack)

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

    $169.99

  5. ECP5-BB Pentek Whole House Filter Replacement Cartridge (20-Pack)

    ECP5-BB Pentek Whole House Filter Replacement Cartridge (20-Pack)

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

    $254.99

  6. Pentek CHLORPLUS-10 Whole House Water Filter Replacement Cartridge

    CHLORPLUS-10 Pentek Whole House Filter Replacement Cartridge

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

    As Low As $18.00 Per Filter

  7. Pentek CW-MF Whole House Water Filter Replacement Cartridge

    CW-MF Pentek Whole House Filter Replacement Cartridge

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

    As Low As $5.60 Per Filter

  8. ECP5-BB Pentek Whole House Water Filter

    ECP5-BB Pentek 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

    As Low As $12.75 Per Filter

  9. Pentek ECP50-BB Whole House Water Filter Replacement Cartridge

    ECP50-BB Pentek 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

    As Low As $19.67 Per Filter

  10. EPM-20 Pentek Whole House Water Filter

    EPM-20 Pentek Whole House Filter Replacement Cartridge

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

    As Low As $12.75 Per Filter

  11. Pentek NCP-20 Whole House Water Filter Replacement Cartridge

    NCP-20 Pentek Whole House Filter Replacement Cartridge

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

    As Low As $13.00 Per Filter

  12. NCP-BB Pentek Whole House Water Filter
  13. Pentek P1-20 Whole House Water Filter Replacement Cartridge

    P1-20 Pentek Whole House Filter Replacement Cartridge

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

    As Low As $9.75 Per Filter

  14. TFM-24 Desal Reverse Osmosis Membrane

    TFM-24 Desal Reverse Osmosis Membrane

    Fits select reverse osmosis systems Learn More
    $24.99 Retail Price:  $47.14
  15. EPM-10 Pentek Undersink Filter Replacement Cartridge

    EPM-10 Pentek Undersink Filter Replacement Cartridge

    Fits any standard housing that uses 9 3/4-inch x 2 1/2-inch replacement filter cartridges Learn More
    $9.99 Retail Price:  $10.57
  16. GAC-10 Pentek Undersink Filter Replacement Cartridge

    GAC-10 Pentek Undersink Filter Replacement Cartridge

    Fits any standard housing that uses 9 3/4-inch x 2 1/2-inch replacement filter cartridges Learn More
    $12.99
  17. NCP-10 Pentek Undersink Filter Replacement Cartridge

    NCP-10 Pentek Undersink Filter Replacement Cartridge

    Fits any standard housing that uses 9 3/4-inch x 2 1/2-inch replacement filter cartridges Learn More
    $9.99 Retail Price:  $11.95
  18. P1 Pentek Whole House Filter Replacement Cartridge

    P1 Pentek Whole House Filter Replacement Cartridge

    Fits any standard housing that uses 9 3/4-inch x 2 1/2-inch replacement filter cartridges Learn More
    $7.99
  19. P5-20 Pentek Whole House Filter Replacement Cartridge

    P5-20 Pentek Whole House Filter Replacement Cartridge

    Fits any standard housing that uses 20-inch x 2 1/2-inch replacement filter cartridges Learn More
    $9.99 Retail Price:  $12.34
  20. PCF1-10MB Pentek Whole House Filter Replacement Cartridge

    PCF1-10MB Pentek Whole House Filter Replacement Cartridge

    Fits any standard housing that uses 9 3/4-inch x 2 1/2-inch replacement filter cartridges Learn More
    $25.99 Retail Price:  $30.69
  21. PCF1-20MB Pentek Whole House Filter Replacement Cartridge

    PCF1-20MB Pentek Whole House Filter Replacement Cartridge

    Fits any standard housing that uses 20-inch x 2 1/2-inch replacement filter cartridges Learn More
    $42.99 Retail Price:  $49.67
  22. PD-10-934 Pentek Whole House Filter Replacement Cartridge

    PD-10-934 Pentek Whole House Filter Replacement Cartridge

    Fits any standard housing that uses 10-inch x 2 1/2-inch replacement filter cartridges Learn More
    $7.99 Retail Price:  $8.15
  23. PD-25-934 Pentek Whole House Filter Replacement Cartridge

    PD-25-934 Pentek Whole House Filter Replacement Cartridge

    Fits any standard housing that uses 9 3/4-inch x 2 1/2-inch replacement filter cartridges Learn More
    $7.99 Retail Price:  $8.15
  24. PD-5-20 Pentek Whole House Filter Replacement Cartridge

    PD-5-20 Pentek Whole House Filter Replacement Cartridge

    Fits any standard housing that uses 20-inch x 2 1/2-inch replacement filter cartridges Learn More
    $10.99 Retail Price:  $12.98
  25. PD-5-934 Pentek Undersink Filter Replacement Cartridge

    PD-5-934 Pentek Undersink Filter Replacement Cartridge

    Fits any standard housing that uses 9 3/4-inch x 2 1/2-inch replacement filter cartridges Learn More
    $9.99 Retail Price:  $12.34

Items 1 to 25 of 40 total

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