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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. P5-20BB Tier1 Whole House Sediment Water Filter

    P5-20BB Tier1 Whole House Sediment Water Filter

    Fits filtration system housings that accept 20 x 4.5 inch cartridges Learn More
    $17.99 Retail Price:  $27.59
  2. ECP5-20BB Pentek Comparable Whole House Sediment Water Filter by Tier1

    ECP5-20BB Pentek Comparable Whole House Sediment Water Filter by Tier1

    Fits most 20 x 5-inch filter housings Learn More
    $23.99 Retail Price:  $29.99
  3. TIER1-DGD1-20BB Whole House Sediment Water Filter

    DGD-2501-20 Pentek Comparable Whole House Sediment Water Filter by Tier1

    Fits most standard 20 x 5-inch housings Learn More
    $21.99 Retail Price:  $24.34
  4. WB-HB-20-20W Harmsco Pleated Commercial Water Filter Cartridge

    WB-HB-20-20W Harmsco Pleated Commercial Water Filter Cartridge

    Fits most standard 20 x 4.5-inch filter housings Learn More
    $28.99 Retail Price:  $37.99
  5.  WB-HB-20-50W Harmsco Pleated Commercial Water Filter Cartridge

    WB-HB-20-50W Harmsco Pleated Commercial Water Filter Cartridge

    Fits most standard 20 x 4.5-inch filter housings Learn More
    $27.99 Retail Price:  $37.99
  6. P5-20BB Tier1 Whole House Sediment Water Filter (2-Pack)

    P5-20BB Tier1 Whole House Sediment Water Filter (2-Pack)

    Fits filtration system housings that accept 20 x 4.5 inch cartridges Learn More

    $34.99

  7. P5-20BB Tier1 Whole House Sediment Water Filter (6-Pack)

    P5-20BB Tier1 Whole House Sediment Water Filter (6-Pack)

    Fits filtration system housings that accept 20 x 4.5 inch cartridges Learn More

    $91.99

  8. Hydronix SDC-45-2001 Whole House Sediment Filter Cartridge (6-Pack)

    SDC-45-2001 Hydronix Whole House Replacement Sediment Filter Cartridge (6-Pack)

    Fits most Big Blue housings that accept 20-inch x 4.5-inch water filter cartridges Learn More

    $112.99

  9. Hydronix SDC-45-2005 Whole House Sediment Filter Cartridge (6-Pack)

    SDC-45-2005 Hydronix Whole House Replacement Sediment Filter Cartridge (6-Pack)

    Fits most Big Blue housings that accept 20-inch x 4.5-inch water filter cartridges Learn More

    $112.99

  10. SDC-45-2010 Hydronix Water Filter Cartridge 6-Pack

    SDC-45-2010 Hydronix Sediment Water Filter Cartridge (6-Pack)

    10-micron filter fits into water filtration systems that use 20-inch x 4.5-inch filter replacements Learn More

    $114.99

  11. SDC-45-2020 Hydronix Sediment Water Filter 6-Pack
  12. SPC-45-2020 Hydronix 20 x 4.5 inch Pleated Sediment Water Filter 6pk

    SPC-45-2020 Hydronix 20 x 4.5 inch Pleated Sediment Water Filter 20 Micron (6-Pack)

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

    $114.99

  13. SPC-45-2050 Hydronix 20 x 4.5 inch Pleated Sediment Water Filter 6pk

    SPC-45-2050 Hydronix 20 x 4.5 inch Pleated Sediment Water Filter 50 Micron (6-Pack)

    Fits into systems that use the Liquatec SPF-45-2050, Pentek 255496-43 and Watts FM-BB-50-20 water filters Learn More

    $112.99

  14. ECP5-20BB Pentek Whole House Filter Replacement Cartridge (6-Pack)

    ECP5-20BB Pentek Whole House Filter Replacement Cartridge (6-Pack)

    Fits Pentek 20-inch Big Blue and any standard housing that uses 20-inch x 4 1/2-inch replacement filter cartridges Learn More

    $132.99

  15. 3M Aqua-Pure AP815-2 Whole House Water Filter

    AP815-2 3M Aqua-Pure Whole House Filter Replacement Cartridge

    Fits 3M Aqua-Pure whole house water filter systems Learn More
  16. NCP-20BB Pentek Whole House Filter Replacement Cartridge

    NCP-20BB Pentek Whole House Filter Replacement Cartridge

    Fits Pentek Big Blue and most standard 20-inch heavy duty housings that use 20-inch x 4 1/2-inch replacement filter cartridges Learn More
    $35.99 Retail Price:  $36.67
  17. OAC-20BB Pentek Oil Reduction Filter

    OAC-20BB Pentek Oil Reduction Water Filter

    Fits most Big Blue filtration system housings that accept 20-inch x 4.5-inch water filter cartridges Learn More
    $73.99 Retail Price:  $85.20
  18. 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
    $22.99 Retail Price:  $25.34
  19. W20FFPH1CBPR Watts Flowmatic Big Clear Whole House Water Filter Housing

    W20FFPH1CBPR Watts Flowmatic Big Clear Whole House Water Filter Housing

    Fits 20-inch by 4.5-inch water filter Learn More
    $110.99 Retail Price:  $113.34
  20. SPC-45-2050 Hydronix Pleated Sediment Water Filter

    SPC-45-2050 Hydronix Pleated Sediment Water Filter (20 in x 4.5 in, 50 Micron)

    Fits into systems that use the Liquatec SPF-45-2050, Pentek 255496-43 and Watts FM-BB-50-20 water filters Learn More
    $20.99 Retail Price:  $29.89
  21. 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
    $21.99 Retail Price:  $32.19
  22. SPC-45-2030 Hydronix Pleated Sediment Water Filter

    SPC-45-2030 Hydronix Pleated Sediment Water Filter

    20 inches by 4.5 inches, 30 micron. Fits into systems that use Liquatec SPF-45-2030, Pentek 155430-43 and Pentek R30-20BB water filters Learn More
    $21.99 Retail Price:  $31.04
  23. SWC-45-2005 Hydronix String-Wound Sediment Water Filter

    SWC-45-2005 Hydronix String-Wound Sediment Water Filter

    20 inches by 4.5 inches, 5 micron. Fits into most 20-inch Big Blue water filtration housings and replaces Liquatec SWF-45-2005, Pentek 355223-43 and Watts SF5-20-425 water filters Learn More
    $25.99 Retail Price:  $26.44
  24. SPC-45-2001 Hydronix Pleated Sediment Water Filter

    SPC-45-2001 Hydronix Pleated Sediment Water Filter

    Fits water filtration systems that use the Liquatec SPF-45-2001, Pentek 255493-43 and Watts FM-BB-20-1 filters Learn More
    $26.99 Retail Price:  $34.49
  25. FM-BB-20-1A Watts Pleated Water Filter Cartridge

    FM-BB-20-1A Watts Pleated Water Filter Cartridge

    Sized 20 x 4.5 inches Learn More
    $49.99 Retail Price:  $75.84

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