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. AF-20-2015-BB Tier1 Aries Comparable KDF and Carbon Water Filter

    AF-20-2015-BB Tier1 Aries Comparable KDF and Carbon Water Filter

    Fits water filtration systems that accept 20 x 4.5 inch cartridges, including the #20 Big Blue and Big Boy housings by Pentek Learn More
    $89.99 MSRP:  $119.99
  2. 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
  3. TIER1-DGD1-20BB Whole House Sediment Water Filter

    DGD-2501-20 Pentek Comparable Whole House Sediment Water Filter by Tier1

    Fits most standard 20 x 5-inch housings Learn More
    $18.99 MSRP:  $24.99
  4. 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
    $18.99 MSRP:  $25.99
  5. 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 MSRP:  $37.99
  6.  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
    $29.59 MSRP:  $39.99
  7. Hydronix SDC-45-2001 Whole House Sediment Filter Cartridge

    SDC-45-2001 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 $23.50 Per Filter

  8. 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

  9. DGD-2501-20 Pentek Whole House Sediment Filter

    Pentek DGD-2501-20 Sediment Water Filter Cartridge Replacements

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

    As Low As $21.67 Per Filter

  10. 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

  11. DGD-7525-20 Pentek Whole House Water Filter

    DGD-7525-20 Pentek Whole House Replacement Sediment Filter Cartridge

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

    As Low As $21.00 Per Filter

  12. Pentek ECP1-20BB Replacement Water Filter Cartridge

    ECP1-20BB 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 $23.00 Per Filter

  13. Pentek ECP20-20BB Replacement Water Filter Cartridge

    Pentek ECP20-20BB Pleated Sediment Water Filter Cartridge

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

    As Low As $21.33 Per Filter

  14. 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

  15. Pentek ECP50-20BB Replacement Water Filter Cartridge

    ECP50-20BB 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 $22.67 Per Filter

  16. 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

  17. 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

  18. 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

  19. 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

  20. 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

  21. Tier1 P20-20BB Whole House Replacement Sediment Filter Cartridge

    P20-20BB Tier1 Whole House Replacement Sediment Filter Cartridge

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

    As Low As $15.00 Per Filter

  22. ECP5-20BB Pentek Comparable Whole House Sediment Water Filter by Tier1 (12-Pack)
  23. ECP5-20BB Pentek Comparable Whole House Sediment Water Filter by Tier1 (4-Pack)
  24. ECP5-20BB Pentek Comparable Whole House Sediment Water Filter by Tier1 (6-Pack)
  25. ECP5-20BB Pentek Comparable Whole House Sediment Water Filter by Tier1 (25-Pack)

    ECP5-20 Pentek Comparable Whole House Sediment Water Filter by Tier1 (25-Pack)

    Fits most 20 x 5-inch filter housings Learn More

    (Retail Price: $531.99 ) $449.99

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