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. CFBC-10 Pentek Whole House Carbon Block Water Filter

    CFBC-10 Pentek Whole House Carbon Block Water Filter

    Fits in housings that accept 10 x 2-1/2 inch replacement filters Learn More
    $13.99
  2. 4002575/GRO-75EN Pentair GPD Encapsulated Membrane

    4002575/GRO-75EN Pentair GPD Encapsulated Membrane

    Used in most conventional units Learn More
    $74.99 MSRP:  $92.99
  3. Pentair HEPP10-40DB Pureflex High Efficiency

    Pentair HEPP10-40DB Pureflex High Efficiency

    Fits standard filter housings that accept 40 x 2.5-inch filters Learn More
    $93.99 MSRP:  $113.99

    Out of stock

  4. Pentair HEPP10-30DB Pureflex High Efficiency Cartridge

    Pentair HEPP10-30DB Pureflex High Efficiency Cartridge

    Fits standard filter housings that accept 30 x 2.5-inch filters Learn More
    $107.99 MSRP:  $130.99

    Out of stock

  5. Pentair NEPP12-40DB Pureflex Pleated Polypropylene Cartridge

    Pentair NEPP12-40DB Pureflex Pleated Polypropylene Cartridge

    Fits standard filter housings that accept 40 x 2.5-inch filters Learn More
    $49.99 MSRP:  $61.99

    Out of stock

  6. Pentair HEPP10-20DB Pureflex Pleated Polypropylene Cartridge

    Pentair HEPP10-20DB Pureflex Pleated Polypropylene Cartridge

    Fits standard filter housings that accept 20 x 2.5-inch filters Learn More
    $77.99 MSRP:  $94.99
  7. Pentair NEPP2-40DB Pureflex Pleated Polypropylene Cartridge

    Pentair NEPP2-40DB Pureflex Pleated Polypropylene Cartridge

    Fits standard filter housings that accept 40 x 2.5-inch filters Learn More
    $41.99 MSRP:  $52.99

    Out of stock

  8. Pentair NEPP2-20DB Pureflex Pleated Polypropylene Cartridge

    Pentair NEPP2-20DB Pureflex Pleated Polypropylene Cartridge

    Fits standard filter housings that accept 20 x 2.5-inch filters Learn More
    $62.99 MSRP:  $77.99

    Out of stock

  9. Pentair GF20-40BPPPDB Industrial Triflex Microfiberglass Cartridge

    Pentair GF20-40BPPPDB Industrial Triflex Microfiberglass Cartridge

    Fits systems that accept 40 x 2.5-inch filters Learn More
    $52.99 MSRP:  $67.99

    Out of stock

  10. Pentair GF20-30BPPPDB Industrial Triflex Microfiberglass Cartridge

    Pentair GF20-30BPPPDB Industrial Triflex Microfiberglass Cartridge

    Fits systems that accept 30 x 2.5-inch filters Learn More
    $57.99 MSRP:  $72.99
  11. Pentek WS-10 Water Softening Water Filter

    Pentek WS-10 Water Softening Filter

    Fits most standard housings that accept 10-inch x 2.5-inch water filter cartridges Learn More

    As Low As $19.66 Per Filter

  12. S1 Pentek Comparable Whole House Water Filter by Tier1

    S1 Pentek Comparable Whole House Water Filter by Tier1

    Fits PENTEK-S1 and GE FXWPC Learn More

    As Low As $6.83 Per Filter

    Out of stock

  13. WRC25HD20 American Plumber Comparable Granular Activated Carbon Filter by Tier1

    WRC25HD20 American Plumber Comparable Granular Activated Carbon Filter by Tier1

    The WRC25HD20 American Plumber comparable replacement granular activated carbon filter by Tier1, is universal for a variety of water filter housings sized 20x4.5 inches. Learn More

    As Low As $0.00 Per Filter

  14. GAC20-BB Pentek Comparable Granular Activated Carbon Filter by Tier1

    GAC20-BB Pentek Comparable Granular Activated Carbon Filter by Tier1

    The GAC-20BB Pentek comparable replacement granular activated carbon filter by Tier1, is universal for a variety of water filter housings sized 20x4.5 inches. Learn More

    As Low As $0.00 Per Filter

  15. AP817-2 Aquapure Comparable Granular Activated Carbon Filter by Tier1

    AP817-2 Aquapure Comparable Granular Activated Carbon Filter by Tier1

    The AP817-2 Aquapure comparable replacement granular activated carbon filter by Tier1, is universal for a variety of water filter housings sized 20x4.5 inches. Learn More

    As Low As $0.00 Per Filter

  16. FXB20RFL Filtrex Comparable Granular Activated Carbon Filter by Tier1

    FXB20RFL Filtrex Comparable Granular Activated Carbon Filter by Tier1

    Fits most water filter housings that require a 20-inch x 4.5-inch filter cartridge Learn More

    As Low As $0.00 Per Filter

  17. TLC-36 Pentair Comparable Reverse Osmosis Membrane by Tier1

    TLC-36 Pentair Comparable Reverse Osmosis Membrane by Tier1

    Fits select Culligan reverse osmosis systems Learn More

    As Low As $0.00 Per Filter

  18. WP-5 Pentek Replacement Filter Cartridge

    WP-5 Pentek Replacement Filter Cartridge

    Fits most standard housings that accept 10-inch x 2.5-inch water filter cartridges Learn More
    $6.99 MSRP:  $8.84
  19. RFFE20-BB Pentek Iron Reducing Water Filter Cartridge (20 in x 4.5 in)

    RFFE20-BB Pentek Iron Reducing Water Filter Cartridge (20 in x 4.5 in)

    Built to fit into 20-inch Big Blue water filtration systems Learn More

    As Low As $71.00 Per Filter

  20. GAC20-BB Pentek Replacement Granular Activated Carbon Filter by Tier1

    GAC20-BB Pentek Replacement Granular Activated Carbon Filter by Tier1

    Fits most water filter housings that require a 20-inch x 4.5-inch filter cartridge Learn More
    $62.99
  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. WS-20 Pentek Water Softening Filter

    WS-20 Pentek Water Softening Filter

    Fits most standard housings that accept 20-inch x 2.5-inch water filter cartridges Learn More
    $26.99 MSRP:  $35.64

    Out of stock

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