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. W9240002 Doulton Specialty Replacement Filter Cartridge

    W9240002 Doulton Specialty Replacement 5 Micro Pre-Filter Cartridge

    Fits pressurized Doulton HIP2 Duo and HIP3 Triple housing systems Learn More
    $20.00 MSRP:  $24.99
  2. 22006 Hydrologic BigBoy Replacement Carbon Filter - Green
  3. CB-25-2010 Hydronix Replacement Filter Cartridge

    CB-25-2010 Hydronix Replacement Filter Cartridge

    Fits most housings that accept 20-inch x 2.5-inch water filter cartridges Learn More
    $15.69 MSRP:  $23.99
  4. CB-45-2010 Hydronix Replacement Filter Cartridge

    CB-45-2010 Hydronix Replacement Filter Cartridge

    Fits most Big Blue housings that accept 20-inch x 4.5-inch water filter cartridges Learn More
    $48.99 MSRP:  $58.99
  5. SDC-25-2010 Hydronix Whole House Replacement Sediment Filter Cartridge

    SDC-25-2010 Hydronix Whole House Replacement Sediment Filter Cartridge

    Fits most housings that accept 20-inch x 2.5-inch water filter cartridges Learn More
    $8.99 MSRP:  $12.34
  6. 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
  7. PCF1-20MB Pentek Whole House Filter Replacement Cartridge

    PCF1-20MB Pentek Whole House Filter Replacement Cartridge

    Fits any standard housing that uses 20-inch x 2 1/2-inch replacement filter cartridges Learn More
    $42.99 MSRP:  $49.67
  8. 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
  9. 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
  10. WS-20BB Pentek Whole House Filter Replacement Cartridge

    WS-20BB Pentek Whole House Filter Replacement Cartridge

    Fits any standard housing that uses 20-inch x 4 1/2-inch filter cartridges Learn More
    $45.99 MSRP:  $52.08
  11. PX10-20 Purtrex Replacement Filter Cartridge

    PX10-20 Purtrex Replacement Water Filter

    Fits industry standard filtration system housings that use 2.5-inch x 20-inch replacement filters Learn More
    $6.99 MSRP:  $9.19
  12. KDF55-20 Tier1 Replacement Filter Cartridge

    KDF55-20 Tier1 Replacement Filter Cartridge

    Fits most standard housings that accept 20-inch x 2.5-inch water filter cartridges Learn More
  13. GX10-20 Hytrex Replacement Filter Cartridge

    GX10-20 Hytrex Water Filter Cartridge

    For filtration system housings that use 2.5-inch x 20-inch water filter cartridges Learn More
    $7.99 MSRP:  $11.49
  14. GX10-9-78 Hytrex Replacement Filter Cartridge

    GX10-9-78 Hytrex Replacement Water Filter Cartridge

    Fits industry standard filter housings that use 2.5-inch x 10-inch water filters Learn More
    $6.99 MSRP:  $8.61
  15. 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
    $16.99 MSRP:  $21.99
  16. SPC-45-2010 Hydronix Pleated Sediment Water Filter Cartridge

    SPC-45-2010 Hydronix Pleated Sediment Water Filter Cartridge

    20 inches by 4.5 inches, 10 micron. Fits into systems that use the Liquatec SPF-45-2010 water filter Learn More
    $23.99 MSRP:  $32.19
  17. WPX10BB97P Pentek Fibrillated Polypropylene Water Filter

    WPX10BB97P Pentek Fibrillated Polypropylene Water Filter

    10 inches by 4.5 inches, 10 micron, fits Culligan HD-950 and 10 inch Big Blue Whole House water filtration systems Learn More
    $20.99 MSRP:  $22.99
  18. CB-45-1010 Hydronix Replacement Whole House Carbon Water Filter

    CB-45-1010 Hydronix Replacement Whole House Carbon Water Filter

    Fits in housings that accept 10 x 4-1/2 inch replacement filters Learn More
    $24.39
  19. 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
  20. KDF85-10BB Tier1 Water Filter

    KDF85-10BB Tier1 Water Filter

    Sized at 10 x 4.5 inches, this filter will fit into all #10 Big Blue filtration system housings Learn More
    $81.99 MSRP:  $86.24
  21. KDF85-20 Tier1 Water Filter

    KDF85-20 Tier1 Water Filter

    Sized at 20 x 2.5 inches, this filter will fit into all #20 Standard or Slimline water filtration system housings Learn More
  22. F-20-2215 Aries Polypropylene Sediment Water Filter Replacement by Tier1
  23. Hydronix SDC-25-3010 Polypropylene Sediment Filter

    Hydronix SDC-25-3010 Polypropylene Sediment Filter

    Standard 30 inch by 2.5 inch size fits many standard size filter housings Learn More
    $16.99
  24. NCP-BB Pentek Comparable Whole House Carbon Filter by Tier1

    NCP-BB Pentek Comparable Whole House Carbon Sediment Water Filter by Tier1

    Fits most standard 10-inch housings Learn More
    $28.99 MSRP:  $32.34
  25. 655130-43/DFX-CB-10 Pentek Diamond Polyspun Carbon Block Replacement

    655130-43/DFX-CB-10 Pentek Diamond Polyspun Carbon Block Replacement

    Fits housings that take filters sized 10 x 2-1/2 Learn More
    $13.99 MSRP:  $18.99

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