Discount Water Filters and Air Filters at Discount Filter Store.com

When we protect your filter purchase with our No Worries Guarantee, we mean it!

No Worries...
  • Your filters are guaranteed to be the right fit!
  • Our products are price match guaranteed!
  • Our customer service team is guaranteed to answer your call!
  • You’re guaranteed to find expert help!

Learn more about our No Worries Guarantee

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.

Clear All
Compare

Items 1 to 25 of 121 total

Page:
  1. 1
  2. 2
  3. 3
  4. 4
  5. 5

Grid  List 

Set Ascending Direction
  1. 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
  2. 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
    $38.99
  3. 22010 Hydrologic BigBoy Replacement Sediment Filter

    22010 Hydrologic BigBoy Sediment Filter

    $44.99 MSRP:  $57.49
  4. SDC-25-2020 Hydronix Whole House Replacement Sediment Filter Cartridge

    SDC-25-2020 Hydronix Whole House Replacement Sediment Filter Cartridge

    Fits most housings that accept 20-inch x 2.5-inch water filter cartridges Learn More
    $7.99 MSRP:  $11.34
  5. PX20-20 Purtrex Replacement Filter Cartridge

    PX20-20 Purtrex Replacement Water Filter

    For industry standard filtration system housings that use 2.5-inch x 20-inch replacement filters Learn More
    $10.99 MSRP:  $14.99
  6. FPIR-BB-20 Watts Whole House Replacement Filter Cartridge

    FPIR-BB-20 Watts Whole House Iron Water Filter Cartridge

    For use in water filtration system housings that use a 20-inch x 4.5-inch filter Learn More
  7. FPMB-BB20-10 Watts Flo-Pro Whole House Replacement Filter Cartridge

    FPMB-BB20-10 Watts Flo-Pro Whole House Water Filter Cartridge

    Fits most standard water filtration system housings requiring a 9 3/4-inch x 4 1/2-inch filter Learn More
    $15.99 MSRP:  $17.34
  8. FPMB20-20 Watts Flo-Pro Whole House Replacement Filter Cartridge

    FPMB20-20 Watts Flo-Pro Whole House Water Filter Cartridge

    Fits water filtration system housing that accept a 20-inch x 2.5-inch filter Learn More
    $9.99 MSRP:  $12.34

    Out of stock

  9. GX20-20 Hytrex Replacement Filter Cartridge

    GX20-20 Hytrex Water Filter Cartridge

    Fits water filter housings that use 2.5-inch x 20-inch cartridges Learn More
    $7.99 MSRP:  $11.49
  10. SPC-25-2020 Hydronix Pleated Sediment Water Filter

    SPC-25-2020 Hydronix Pleated Sediment Water Filter

    20 inches by 2.5 inches, 20 micron. Fits into systems that use Liquatec SPF-25-2020, Pentek 255487-43 and Watts FM-20-20 water filters Learn More
    $14.99 MSRP:  $20.99

    Out of stock

  11. FXB20RFL Filtrex Green Radial Flow Water Filter Cartridges
  12. Pentek ECP20-10 Replacement Water Filter Cartridge

    ECP20-10 Pentek Replacement Filter Cartridge

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

    As Low As $6.30 Per Filter

  13. Pentek PS20-20C Whole House Replacement Sediment Water Filter

    PS20-20C Pentek Whole House Replacement Sediment Filter Cartridge

    Fits most standard housings that accept 20-inch x 2.5-inch water filter cartridges Learn More

    As Low As $9.50 Per Filter

    Out of stock

  14. S1-20 Pentek Whole House Filter Replacement Cartridge

    S1-20 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 $10.50 Per Filter

  15. AP-GRMB-20PP-20UB Aquapure Comparable Sediment Water Filter by Tier 1

    AP-GRMB-20PP-20UB 3M Aqua-Pure Comparable Sediment Water Filter by Tier1

    Fits standard 20 x 2.5 inch filter housings Learn More

    As Low As $0.00 Per Filter

  16. SDC-25-2020 Hydronix Comparable Sediment Water Filter by Tier1

    SDC-25-2020 Hydronix Comparable Sediment Water Filter by Tier1

    Fits standard 20 x 2.5 inch filter housings Learn More

    As Low As $0.00 Per Filter

  17. S1-20 Pentek Comparable Whole House Filter Replacement Cartridge by Tier1

    S1-20 Pentek Comparable Whole House Filter Replacement Cartridge by Tier1

    Fits any standard housing that uses 20-inch x 2 1/2-inch replacement filter cartridges Learn More

    As Low As $5.00 Per Filter

  18. 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
  19. 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
  20. S1-20BB Pentek Whole House Filter Replacement Cartridge

    S1-20BB 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
    $21.99 MSRP:  $25.34
  21. 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
  22. S1-BB Pentek Comparable Whole House Sediment Water Filter by Tier1

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

    Fits most 10-inch standard housings Learn More
    $11.99 MSRP:  $17.99
  23. 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
  24. WCC American Plumber Undersink Filter Replacement Cartridge

    WCC American Plumber Undersink Filter Replacement Cartridge

    Fits American Plumber W38-PR and most standard size water filter housings Learn More
    $19.99 MSRP:  $26.44
  25. WGC478 American Plumber Undersink Compact Filter Replacement Cartridge

    WGC478 American Plumber Undersink Compact Filter Replacement Cartridge

    Fits American Plumber WGC478 Learn More
    $13.99 MSRP:  $14.94

Items 1 to 25 of 121 total

Page:
  1. 1
  2. 2
  3. 3
  4. 4
  5. 5

Grid  List 

Set Ascending Direction
Scroll To Top