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. S1A-D Culligan Comparable Whole House Sediment Water Filter 2-Pack by Tier1

    S1A-D Culligan Comparable Whole House Sediment Water Filter by Tier1(2-Pack)

    Fits most standard 10 x 2.5-inch housings Learn More
    $5.99 MSRP:  $12.99
  2. W20CLA American Plumber Comparable Whole House Water Filter by Tier1

    W20CLA American Plumber Comparable Whole House Water Filter by Tier1 (2-Pack)

    Standard 10 inch by 2.5 inch size fits many standard size filter housings Learn More
    $6.99 MSRP:  $10.99
  3. RS1SS OmniFilter Comparable Whole House Water Filter by Tier1

    RS1SS OmniFilter Comparable Whole House Water Filter by Tier1

    Fits OmniFilter RS1-SS and GE FXWPC Learn More
    $5.99 MSRP:  $10.99
  4. WFPFC3002 DuPont Universal Whole House Pleated Poly Filter Cartridge (2-Pack)

    WFPFC3002 DuPont Universal Whole House Pleated Poly Filter Cartridge (2-Pack)

    Fits DuPont Whole House Filter Systems and most other brands of 10 x 2.5-inch systems Learn More
    $13.99 MSRP:  $21.16
  5. RS1-SS OmniFilter Whole House Water Filter

    RS1-SS OmniFilter Replacement Whole House Water Filter Cartridge

    Fits any brand of whole house water filter system that uses standard 9 3/4 x 2 1/2 filter cartridges Learn More

    As Low As $5.40 Per Filter

  6. Pentek S1-BB Replacement Water Filter Cartridge

    Pentek S1-BB Water Filter Cartridge Replacement

    Fits most Big Blue housings that accept 10-inch x 4.5-inch water filter cartridges Learn More

    As Low As $5.40 Per Filter

  7. S1-20BB Pentek Comparable Whole House Water Filter by Tier1

    S1-20BB Pentek Comparable Whole House Water Filter by Tier1

    Fits PENTEK S1-20BB, American Plumber W20CLHD20 and 155305 Learn More

    As Low As $15.33 Per Filter

  8. HB-20-20W Harmsco Comparable Whole House Sediment Water Filter by Tier1 (alternate)

    HB-20-20W Harmsco Comparable Whole House Sediment Water Filter by Tier1

    Fits into systems that use the Liquatec SPF-45-2020, Pentek 255495-43 and Watts FM-BB-20-20 water filters Learn More

    As Low As $0.00 Per Filter

  9. 22010 Hydrologic Comparable Whole House Water Filter by Tier1

    22010 Hydrologic Comparable Whole House Water Filter by Tier1

    Fits into systems that use the Liquatec SPF-45-2020, Pentek 255495-43 and Watts FM-BB-20-20 water filters Learn More

    As Low As $0.00 Per Filter

  10. SPC-45-2020 Hydronix Comparable Whole House Water Filter by Tier1 (alternate)

    SPC-45-2020 Hydronix Comparable Whole House Water Filter by Tier1

    Fits into systems that use the Liquatec SPF-45-2020, Pentek 255495-43 and Watts FM-BB-20-20 water filters Learn More

    As Low As $0.00 Per Filter

  11. ECP20-20BB Pentek Comparable Whole House Water Filter by Tier1

    ECP20-20BB Pentek Comparable Whole House Water Filter by Tier1

    Fits PENTEK S1-20BB, American Plumber W20CLHD20 and 155305 Learn More

    As Low As $0.00 Per Filter

  12. S1-20BB-Pentek Comparable Whole House Water Filter by Tier1

    S1-20BB-Pentek Comparable Whole House Water Filter by Tier1

    Fits PENTEK S1-20BB, American Plumber W20CLHD20 and 155305 Learn More

    As Low As $0.00 Per Filter

  13. W20CLHD20 American Plumber Comparable Whole House 20-inch Heavy Duty Filter Cartridge by Tier1

    W20CLHD20 American Plumber Comparable Whole House 20-inch Heavy Duty Filter Cartridge by Tier1

    Fits PENTEK S1-20BB, American Plumber W20CLHD20 and 155305 Learn More

    As Low As $0.00 Per Filter

  14. W20CLA American Plumber Whole House Sediment Filter Cartridge (2-Pack)

    W20CLA American Plumber Whole House Sediment Water Filter Cartridge (2-Pack)

    Built to fit into American Plumber W34-PR, WC34-PR and WVC34 whole house water filtration systems, in addition to most standard size water filtration system housings Learn More
    $11.99 MSRP:  $15.34
  15. W20CLHD American Plumber Whole House Heavy Duty Filter Cartridge

    W20CLHD American Plumber Whole House Heavy Duty Filter Cartridge

    Fits American Plumber W10-PR and W15-PR and most other heavy duty water filter housings Learn More
    $17.99
  16. W20CLHD20 American Plumber Whole House 20-inch Heavy Duty Filter Cartridge

    W20CLHD20 American Plumber Whole House 20-inch Heavy Duty Filter Cartridge

    Fits American Plumber W2010-PR and W2015-PR and most other 20-inch heavy duty water filter housings Learn More
    $28.99 MSRP:  $35.64
  17. WGCHD American Plumber Undersink Water Filter Replacement Cartridge

    WGCHD American Plumber Undersink Filter Replacement Cartridge

    Fits American Plumber W10-PR and W15-PR and most other heavy duty water filter housings Learn More
    $34.99 MSRP:  $48.29
  18. S1A Culligan Level 2 Whole House Filter Replacement Cartridge (2-Pack)

    S1A-D Culligan Level 2 Whole House Filter Replacement Cartridge (2-Pack)

    Fits Culligan HF-150, HF-160, HF-360, HF-365, and any brand of whole house water filter system that uses standard 9 3/4 x 2 1/2 filter cartridges Learn More
    $7.99 MSRP:  $10.80
  19. RS3-SS OmniFilter Whole House Filter Replacement Cartridge

    RS3-SS OmniFilter Replacement Whole House Water Filter Cartridge

    Fits any brand of whole house water filter system that uses standard 9 3/4 x 2 1/2 filter cartridges Learn More
  20. RS3DS/RS12-DS3-S06 OmniFilter Whole House Replacement Filter Cartridge (2-Pack)

    RS3DS/RS12-DS3-S06 OmniFilter Whole House Water Filter Cartridges (2-Pack)

    Fits into most industry standard 10-inch water filtration system housings Learn More
    $7.99 MSRP:  $10.34

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