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. K5520SS Omnipure Inline GAC Filter Cartridge

    K5520SS Omnipure Inline GAC Water Filter Cartridge

    Fits standard 1/4-inch water lines Learn More
    $21.09 MSRP:  $33.99
  2. P-250 Pentek Comparable Under Sink Water Filter Set Tier1

    P-250 Pentek Comparable Under Sink Water Filter Set by Tier1

    Fits various brands of under-sink housings, including Culligan, Pentek, Ametek and American Plumber Learn More
    $21.99 MSRP:  $41.99
  3. D-250A Culligan Comparable Under Sink Water Filter Set by Tier1

    D-250A Culligan Comparable Under Sink Water Filter Set by Tier1

    Fits various brands of under-sink housings, including Culligan, Pentek, Ametek and American Plumber Learn More

    As Low As $0.00 Per Filter

  4. P-250 Pentek Comparable Under Sink Water Filter Set by Tier1

    P-250 Pentek Comparable Under Sink Water Filter Set by Tier1

    Fits various brands of under-sink housings, including Culligan, Pentek, Ametek and American Plumber Learn More

    As Low As $0.00 Per Filter

  5. P-250A Pentek Comparable Under Sink Filter Set by Tier1

    P-250A Pentek Comparable Under Sink Filter Set by Tier1

    Fits various brands of under-sink housings, including Culligan, Pentek, Ametek and American Plumber Learn More

    As Low As $0.00 Per Filter

  6. WHKF-DB2 Whirlpool Comparable Under Sink Water Filter by Tier1

    WHKF-DB2 Whirlpool Comparable Under Sink Water Filter by Tier1

    Fits various brands of under-sink housings, including Culligan, Pentek, Ametek and American Plumber Learn More

    As Low As $0.00 Per Filter

  7. FXSVC GE SmartWater Comparable Undersink Filter Set by Tier1

    FXSVC GE SmartWater Comparable Undersink Filter Set by Tier1

    Fits various brands of under-sink housings, including GE Learn More

    As Low As $0.00 Per Filter

  8. FX12P GE SmartWater Comparable Reverse Osmosis Filter Set by Tier1

    FX12P GE SmartWater Comparable Reverse Osmosis Filter Set by Tier1

    Fits GE SmartWater reverse osmosis filter systems with model numbers starting with PNRV12, GXRV10, or GXRM10 Learn More

    As Low As $11.99 Per Filter

  9. RFC-93 Pentek Radial Flow Carbon Water Filter Cartridge

    RFC-93 Pentek Radial Flow Carbon Water Filter Cartridge

    Fits standard slim 10 x 2.5-inch water filter housings Learn More
    $23.99 MSRP:  $27.99
  10. ROR2000-S-05 OmniFilter Reverse Osmosis Pre Filter Replacement

    ROR2000-S-05 OmniFilter Reverse Osmosis Pre and Post Filter Replacements

    Fits the OmniFilter RO2000 Series B Reverse Osmosis System Learn More
    $24.99
  11. CW-MF Pentek Comparable Whole House Sediment Waters Filter by Tier1 (6-Pack)
  12. W9222903 Doulton Ceramic Supercarb M15 Replacement Undersink Cartridge
  13. Pentek SCBC-10 Silvered Carbon Block

    Pentek SCBC-10 Silvered Carbon Block

    Standard 10 inch by 2.5 inch size fits many under sink filter housings Learn More
    $22.99 MSRP:  $24.71
  14. MATRIKX-Pb1-10 KX Technologies MatrikX Undersink Filter Replacement Cartridge

    MATRIKX-Pb1-10 KX Technologies MatrikX Undersink Filter Replacement Cartridge

    Fits any standard housing that uses 9 3/4-inch x 2 1/2-inch replacement filter cartridges Learn More
    $20.59 MSRP:  $28.99
  15. TSGAC-10 Pentek Undersink Filter Replacement Cartridge

    TSGAC-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
    $20.99 MSRP:  $24.60
  16. K5567JJ Omnipure Inline Filter Replacement Cartridge

    K5567JJ Omnipure Replacement Inline Water Filter Cartridge

    Fits standard 1/4-inch water lines Learn More
    $20.99 MSRP:  $26.44
  17. C1 Pentek Undersink Filter Replacement Cartridge

    Pentek C1 Undersink Water Filter Replacement Cartridge

    Fits any standard housing that uses 9 3/4-inch x 2 1/2-inch replacement filter cartridges Learn More
    $20.99
  18. W5CIP American Plumber Undersink Filter Replacement Cartridge (2-Pack)

    W5CIP American Plumber Undersink Filter Replacement Cartridge (2-Pack)

    Fits American Plumber W38-PR and most standard size water filter housings Learn More
    $21.99 MSRP:  $24.34
  19. HF-150 Culligan Whole House Filter System
  20. MATRIKX-5-10 KX Technologies MatrikX Undersink Filter Replacement Cartridge

    MATRIKX-5-10 KX Technologies MatrikX Undersink Filter Replacement Cartridge

    Fits any standard housing that uses 9 3/4-inch x 2 1/2-inch replacement filter cartridges Learn More
  21. E5520 Omnipure Replacement Filter Cartridge

    E5520 Omnipure Replacement Filter Cartridge

    Fits Omnipure ELF Series and Everpure permanent filter heads including Insurice, H-100, H-50, OCS, OCS-2, QL-2, and QL-5 Learn More
    $21.99 MSRP:  $26.44
  22. EV9100-08 Everpure IN-10 Inline Filter with 3/8 inch NPT threads

    EV9100-08 Everpure IN-10 Inline Water Filter

    Connects with 3/8 inch NPT threads and fits 1/4-inch water lines Learn More
    $22.19 MSRP:  $30.99
  23. RV-600A Culligan Level 1 Inline RV Pre-Tank Exterior Filter

    RV-600A Culligan Level 1 Inline RV Pre-Tank Exterior Filter

    Fits a standard 3/4-inch garden hose Learn More
  24. K5562-BB-NRW37 Omnipure Deionization Inline Filter

    K5562-BB-NRW37 Omnipure Deionization Inline Filter

    Fits standard 1/4-inch water lines Learn More
    $22.99 MSRP:  $25.29
  25. FXUTC GE SmartWater Undersink Filter Replacement Cartridge

    FXUTC GE SmartWater Undersink Filter Replacement Cartridge

    Fits any brand of undersink water filter system that uses standard 9 3/4 x 2 1/2 filter cartridges Learn More
    $23.69 MSRP:  $35.99

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