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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. HAC-10-W Harmsco Activated Carbon Water Filter Cartridge

    HAC-10-W Harmsco Activated Carbon Water Filter Cartridge

    Fits most standard 10-inch filter housings. Learn More
    $13.99 Retail Price:  $19.99
  2. WB-20-W Harmsco Pleated Commercial Water Filter Cartridge

    WB-20-W Harmsco Pleated Commercial Water Filter Cartridge

    Fits most standard 10-inch x 2.5-inch housings Learn More
    $10.99 Retail Price:  $14.99
  3. WB-HB-20-20W Harmsco Pleated Commercial Water Filter Cartridge

    WB-HB-20-20W Harmsco Pleated Commercial Water Filter Cartridge

    Fits most standard 20 x 4.5-inch filter housings Learn More
    $28.99 Retail Price:  $37.99
  4.  WB-HB-20-50W Harmsco Pleated Commercial Water Filter Cartridge

    WB-HB-20-50W Harmsco Pleated Commercial Water Filter Cartridge

    Fits most standard 20 x 4.5-inch filter housings Learn More
    $27.99 Retail Price:  $37.99
  5. 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

  6. 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

  7. 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

  8. 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

  9. 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

  10. 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

  11. 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

  12. 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

  13. 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

  14. 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

  15. 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

  16. NCP-BB Pentek Whole House Water Filter
  17. 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

  18. Harmsco PO-25-G1PS-EA Polypropylene Filter Bag

    Harmsco PO-25-G1PS-EA Polypropylene Filter Bag

    Fits the Harmsco BCB-1-1.5-EXT extended area filter bag housing Learn More
    $18.99 Retail Price:  $21.34
  19. 801-20 Harmsco Replacement Filter Cartridge

    801-20 Harmsco Replacement Filter Cartridge

    Fits any industry standard housing that accepts 2.5-inch by 10-inch replacement filters Learn More
    $7.99 Retail Price:  $11.49
  20. HB-10-5W Harmsco Calypso Blue Replacement Filter Cartridge

    HB-10-5W Harmsco Calypso Blue Replacement Filter Cartridge

    Fits any industry standard housing that accepts 4.5-inch by 10-inch replacement filters. Learn More
    $23.99 Retail Price:  $24.14
  21. HB-20-1W Harmsco Calypso Blue Replacement Filter Cartridge

    HB-20-1W Harmsco Calypso Blue Replacement Filter Cartridge

    Fits any industry standard housing that accepts 4.5-inch by 20-inch replacement filters. Learn More
    $36.99 Retail Price:  $39.20
  22. HB-20-20W Harmsco Calypso Blue Replacement Filter Cartridge

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

    Fits any industry standard housing that accepts 4.5-inch by 20-inch replacement filters. Learn More
    $39.99
  23. HB-20-50W Harmsco Calypso Blue Replacement Filter Cartridge

    HB-20-50W Harmsco Calypso Blue Replacement Filter Cartridge

    Fits any industry standard housing that accepts 4.5-inch by 20-inch replacement filters. Learn More
    $37.99
  24. 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
    $32.99 Retail Price:  $36.79
  25. HC40-5 Harmsco Replacement Filter Cartridge

    HC40-5 Harmsco Replacement Filter Cartridge

    Fits Hurricane and WaterBetter filter housings that accepts 7 3/4-inch by 9 5/8-inch replacement filters Learn More
    $92.99 Retail Price:  $95.34

Items 1 to 25 of 55 total

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