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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. HYDROLOGIC-22140

    HYDROLOGIC-22140

    $9.99 Retail Price:  $13.79
  2. TIER1-C5-20
  3. TIER1-SDC5-20
  4. AQUAPURE-AP-GRMB-05PP-20UB
  5. TIER1_C5_20_2_PACK
  6. ECP5-20 Pentek Replacement Filter Cartridge (20-Pack)

    ECP5-20 Pentek Replacement Filter Cartridge (20-Pack)

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

    $209.99

  7. ECP5-20 Pentek Replacement Filter Cartridge (6-Pack)

    ECP5-20 Pentek Replacement Filter Cartridge (6-Pack)

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

    $71.99

  8. P5-20 Pentek Whole House Filter Replacement Cartridge (12-Pack)

    P5-20 Pentek Whole House Filter Replacement Cartridge (12-Pack)

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

    $50.00

  9. Pentek EP-20 Replacement Water Filter Cartridge

    EP-20 Pentek Replacement Filter Cartridge

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

    As Low As $15.50 Per Filter

  10. P5-20 Tier1 Sediment Water Filter

    P5-20 Tier1 Whole House Sediment Water Filter

    Sized 20 x 2.5 inches Learn More

    As Low As $4.48 Per Filter

  11. EP5-20 Tier1 Carbon Block Water Filter

    EP5-20 Tier1 Carbon Block Water Filter

    Sized 20 x 2.5 inches Learn More

    As Low As $11.04 Per Filter

  12. Pentek C1-20 Carbon Water Filter Replacement Cartridge

    C1-20 Pentek Replacement Filter Cartridge

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

    As Low As $10.80 Per Filter

  13. AQUAPURE-AP110-2

    AQUAPURE-AP110-2

    $20.99 Retail Price:  $24.94
  14. 3M Aqua-Pure AP110-2C Whole House Water Filter Cartridge

    AP110-2C 3M Aqua-Pure Whole House Water Filter Cartridge

    Fits 3M Aqua-Pure whole house water filtration systems that accept 20 x 2.5 inch filters Learn More
    $19.99 Retail Price:  $25.86
  15. SDC-25-2005 Hydronix Whole House Replacement Sediment Filter Cartridge

    SDC-25-2005 Hydronix Whole House Replacement Sediment Filter Cartridge

    Fits most housings that accept 20-inch x 2.5-inch water filter cartridges Learn More
    $6.99 Retail Price:  $8.27
  16. PURTREX-PX05-20

    PURTREX-PX05-20

    $4.99 Retail Price:  $9.19
  17. WATTS-FPMB5-20

    WATTS-FPMB5-20

    $5.99 Retail Price:  $6.89
  18. GX05-20 Hytrex Replacement Filter Cartridge

    GX05-20 Hytrex Replacement Water Filter Cartridge

    Fits filtration system housings that use 2.5-inch x 20-inch water filter cartridges Learn More
    $9.99 Retail Price:  $11.49
  19. KX-MATRIKX-CTO2-20

    KX-MATRIKX-CTO2-20

    $31.99 Retail Price:  $32.19
  20. CFB-Plus20 Pentek Replacement Filter Cartridge

    CFB-Plus20 Pentek Replacement Water Filter Cartridge

    Fits into most standard water filtration system housings that accept 20-inch x 2.5-inch filter cartridges Learn More
    $16.99 Retail Price:  $21.26
  21. SPC-25-2005 Hydronix Pleated Sediment Water Filter

    SPC-25-2005 Hydronix Pleated Sediment Water Filter

    20 inches by 2.5 inches, 5 micron. Fits into systems that use Liquatec SPF-25-2005, Pentek 255486-43 and Watts FM-5-20 water filters Learn More
    $10.99 Retail Price:  $16.09
  22. CQE-RC-04014 Crystal Quest Carbon Block Water Filter Cartridge

    CQE-RC-04014 Crystal Quest Carbon Block Water Filter Cartridge

    Fits Crystal Quest countertop, undersink and refrigerator water filtration systems Learn More
    $39.99
  23. CQE-RC-04015 Crystal Quest Reusable Pleated Water Filter

    CQE-RC-04015 Crystal Quest Reusable Pleated Water Filter

    Fits Crystal Quest countertop, undersink and refrigerator water filtration systems Learn More
    $21.99 Retail Price:  $32.19
  24. CQE-RC-04020 Crystal Quest Nitrate Water Filter Cartridge

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