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. 22110 Hydrologic SmallBoy Replacement Carbon Filter - Green

    22110 Hydrologic SmallBoy Carbon Filter (Green)

    Fits filtration system housings that use 10 inch by 2.5 inch filter Learn More
    $18.99
  2. EPM-20 Pentek Comparable Whole House Water Filter by Tier1

    EPM-20 Pentek Comparable Whole House Water Filter by Tier1

    Fits standard 20 x 2.5-inch housings Learn More
    $11.99 MSRP:  $20.99
  3. EPM-20 Pentek Whole House Water Filter

    Pentek EPM-20 Whole House Water Filter Replacement Cartridge

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

    As Low As $12.00 Per Filter

  4. Pentek NCP-20 Whole House Water Filter Replacement Cartridge

    Pentek NCP-20 Whole House Water Filter Replacement Cartridge

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

    As Low As $13.00 Per Filter

  5. EPM-BB Pentek Comparable Carbon Whole House Water Filter

    EPM-BB Pentek Comparable Whole House Water Filter by Tier1

    Fits most 10 x 4.5-inch filter housings Learn More

    As Low As $16.16 Per Filter

  6. 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

  7. SDC-45-1010 Hydronix Comparable Sediment Water Filter by Tier1

    SDC-45-1010 Hydronix Comparable Sediment Water Filter by Tier1

    Fits standard filter housings using 10 x 4.5-inch filters Learn More

    As Low As $9.10 Per Filter

  8. SDC-45-2010 Hydronix Comparable Sediment Water Filter by Tier1

    SDC-45-2010 Hydronix Comparable Sediment Water Filter by Tier1

    Fits standard filter housings using 20 x 4.5-inch filters Learn More

    As Low As $13.00 Per Filter

  9. EPM-BB Pentek Comparable Whole House Water Filter by Tier1

    EPM-BB Pentek Comparable Whole House Water Filter by Tier1

    Fits most 10 x 4.5-inch filter housings Learn More

    As Low As $0.00 Per Filter

  10. CW-F-D Culligan Level 3 Whole House Filter Replacement Cartridge (2-Pack)

    CW-F-D Culligan Level 3 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
    $13.99 MSRP:  $17.34
  11. W9240002 Doulton Specialty Replacement Filter Cartridge

    W9240002 Doulton Specialty Replacement Water Filter Cartridge

    Fits pressurized Doulton HIP2 Duo and HIP3 Triple housing systems Learn More
    $18.99 MSRP:  $24.99
  12. SDC-45-1010 Hydronix Whole House Replacement Sediment Filter Cartridge

    SDC-45-1010 Hydronix Whole House Replacement Sediment Filter Cartridge

    Fits most Big Blue housings that accept 10-inch x 4.5-inch water filter cartridges Learn More
    $14.99 MSRP:  $18.34
  13. WP10BB97P Pentek Whole House Filter Replacement Cartridge

    WP10BB97P Pentek Whole House Filter Replacement Cartridge

    Fits most Big Blue housings that accept 10-inch x 4.5-inch water filter cartridges Learn More
    $19.99
  14. PX10-40 Purtrex Replacement Filter Cartridge

    PX10-40 Purtrex Replacement Water Filter

    Fits industry standard filtration system housings that use 2.5-inch x 40-inch filters Learn More
    $12.99 MSRP:  $14.94
  15. 41400009 Hydrotech Reverse Osmosis Filter

    41400009 Hydrotech Reverse Osmosis Filter

    Fits Hydrotech Models from the 1240 Series, 1240 E Series,1240 M Series, 1240 Pro Series, 3VTFC50G, 4VTFC50G, 4VTFC50GPB, F-HT-50, F-HTF-50 and other select models Learn More
    $15.69 MSRP:  $23.99
  16. GX10-30 Hytrex Replacement Filter Cartridge

    GX10-30 Hytrex Water Filter Cartridge

    Fits industry standard filtration housings that use 2.5-inch x 30-inch water filters Learn More
    $12.59 MSRP:  $19.99
  17. 1266690 Merlin Merlin Reverse Osmosis Sediment Filter

    1266690 Merlin Merlin Reverse Osmosis Sediment Filter

    Fits the GE Merlin Reverse Osmosis System Learn More
    $17.89 MSRP:  $27.99
  18. K2333-JJ Omnipure Inline Filter

    K2333-JJ Omnipure Inline Filter

    Fits standard 1/4-inch water lines Learn More
    $12.19 MSRP:  $20.99
  19. K2333-KK Omnipure Inline Filter

    K2333-KK Omnipure Inline Filter

    Fits standard 3/8-inch water lines Learn More
    $14.29 MSRP:  $19.99
  20. K2533JJ Omnipure Water Filter

    K2533JJ Omnipure Water Filter

    $11.99 MSRP:  $13.79
  21. K2533-KK Omnipure Inline Filter

    K2533-KK Omnipure Inline Filter

    Fits standard 3/8-inch water lines Learn More
    $13.99 MSRP:  $14.94
  22. SCL10-B Omnipure Scale Inline Filter

    SCL10-B Omnipure Scale Inline Filter

    Fits standard 1/4-inch water lines Learn More
    $12.99 MSRP:  $17.24
  23. SPC-45-1010 Hydronix Pleated Sediment Water Filter

    SPC-45-1010 Hydronix Pleated Sediment Water Filter

    Sized 9 7/8 inches by 4 1/2 inches, 10 micron Learn More
    $10.99 MSRP:  $18.39
  24. SPC-25-2010 Hydronix Pleated Sediment Water Filter

    SPC-25-2010 Hydronix Pleated Sediment Water Filter

    10 micron filter, sized 20x2.5 inches Learn More
    $10.99 MSRP:  $12.64
  25. AP-GRMB-10PP-20UB Whole House Replacement Cartridge by 3M Aqua-Pure

    AP-GRMB-10PP-20UB Whole House Replacement Filter by 3M Aqua-Pure

    Fits most standard 20-inch x 2.5-inch housings Learn More
    $11.99 MSRP:  $14.34

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