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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. 4002124 American Plumber Whole House Sediment Filter System

    4002124 American Plumber Whole House Sediment Filter System

    Fits standard 1-inch water lines Learn More
    $699.99 Retail Price:  $807.29
  2. W5W American Plumber Whole House Sediment Filter Cartridge (2-Pack)

    W5W American Plumber Whole House Sediment Filter Cartridge (2-Pack)

    Fits American Plumber W34-PR, WC34-PR and WVC34 and most standard size water filter housings Learn More
    $14.99 Retail Price:  $17.34
  3. 3M Aqua-Pure AP1001 Whole House Water Filter Cartridge

    AP1001 3M Aqua-Pure Whole House Filter Replacement Cartridge

    Fits 3M Aqua-Pure whole house water filter systems Learn More
    $31.99 Retail Price:  $40.24
  4. 3M Aqua-Pure AP1003 Water Filter Replacement Cartridge (2-Pack)

    AP1003 3M Aqua-Pure Whole House Filter Replacement Cartridge (2-Pack)

    Fits 3M Aqua-Pure whole house water filter systems Learn More
    $56.99 Retail Price:  $71.29
  5. 3M Aqua-Pure AP101T Whole House Water Filter

    AP101T 3M Aqua-Pure Whole House Water Filtration System

    Fits onto 3/4-inch NPT water lines Learn More
    $103.99 Retail Price:  $137.99
  6. 3M Aqua-Pure AP110 Whole House Water Filter Cartridge

    AP110 3M Aqua-Pure Whole House Filter Replacement Cartridge

    Fits any brand of whole house water filter system that uses standard 9 3/4 x 2 1/2 filter cartridges Learn More
    $12.99 Retail Price:  $13.79
  7. AP111 3M Aqua-Pure Whole House Filter Replacement Cartridge

    AP111 3M Aqua-Pure Whole House Filter Replacement Cartridge

    Fits 3M Aqua-Pure whole house water filter systems Learn More
  8. 3M Aqua-Pure AP111-2 Whole House Water Filter

    AP111-2 3M Aqua-Pure Whole House Filter Replacement Cartridge

    Fits 3M Aqua-Pure whole house water filter systems Learn More
  9. 3M Aqua-Pure AP124 Whole House Water Filter Cartridge

    AP124 3M Aqua-Pure Whole House Filter Replacement Cartridge

    Fits any brand of whole house water filter system that uses standard 9 3/4 x 2 1/2 filter cartridges Learn More
    $13.99 Retail Price:  $17.24
  10. 3M Aqua-Pure AP410 Water Filter Cartridges

    AP410 3M Aqua-Pure Water Filter Cartridge Set (2-Pack)

    Fits the 3M Aqua-Pure AP400 and AP400SS Point of Use water filtration systems Learn More
    $64.99 Retail Price:  $71.29
  11. 3M Aqua-Pure AP420 Water Filter Replacement Cartridge

    AP420 3M Aqua-Pure Whole House Filter Replacement Cartridge (2-Pack)

    Fits any brand of whole house water filter system that uses standard 9 3/4 x 2 1/2 filter cartridges Learn More
    $94.99 Retail Price:  $113.84
  12. 3M Aqua-Pure AP430SS Water Heater Scale Inhibitor

    AP430SS 3M Aqua-Pure Water Heater Scale Inhibitor System

    Fits standard 3/4-inch water heater supply line. Learn More
    $70.99 Retail Price:  $90.84
  13. 3M Aqua-Pure AP815 Whole House Water Filter

    AP815 3M Aqua-Pure Whole House Filter Replacement Cartridge

    Fits any brand of whole house water filter system that uses standard 9 3/4 x 4 1/2 filter cartridges Learn More
  14. CB6 OmniFilter Whole House Filter Replacement Cartridge

    CB6 OmniFilter Whole House Water Filter Cartridge

    Fits any brand of whole house water filtration system that uses 9 3/4 x 4 1/2 water filter cartridges Learn More
    $83.99
  15. CQE-CO-02028 Crystal Quest Commercial Reverse Osmosis Filter System
  16. P1-D Culligan Level 4 Whole House Filter Replacement Cartridge (2-Pack)

    P1-D Culligan Whole House Water Filter Replacement Cartridge (2-Pack)

    Fits Culligan HF-150, HF-160, HF-360 HF-365, and any brand of whole house water filtration system that uses standard 9 3/4 x 2 1/2 filter cartridges Learn More
    $12.99
  17. P5-D Culligan Level 4 Whole House Filter Replacement Cartridge (2-Pack)

    P5-D Culligan Level 4 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
    $12.99 Retail Price:  $15.34
  18. CFS110 Cuno Whole House Filter Replacement Cartridge

    CFS110 Cuno Whole House Filter Replacement Cartridge

    Fits any standard housing that uses 9 3/4-inch x 2 1/2-inch replacement filter cartridges Learn More
    $15.99 Retail Price:  $16.09
  19. HF8-S Cuno Whole House Filter Replacement Cartridge

    HF8-S Cuno Whole House Water Filter Cartridge

    Fits the Cuno Food Service SF18-S for high-temperature equipment Learn More

    Regular Price: $50.99

    Special Price: $39.05

  20. HF95 Cuno Whole House Filter Replacement Cartridge

    HF95 Cuno Whole House Water Filter Cartridge

    Fits the Cuno Food Service High Flow Series filtration system Learn More
    $197.99 Retail Price:  $229.99
  21. HF95-S Cuno Whole House Water Filter Cartridge

    HF95-S Cuno Whole House Water Filter Cartridge

    Fits the Cuno Food Service High Flow Series Models including all SGP, ESP, BREW, BEV, and ICE filtration systems Learn More
    $195.99 Retail Price:  $227.69
  22. W9381000 Doulton High Flow Multi Candle Filter Module

    W9381000 Doulton High Flow Multi Candle Filter Module

    Fits most industry standard 10-inch Big Blue housings Learn More
    $140.99 Retail Price:  $158.36
  23. W9381105 Doulton RIO 2000 Ceramic Multi-Candle Filter Cartridge

    W9381105 Doulton Rio2000 Ceramic Multi-Candle Water Filter Cartridge

    Contains 6 filter candles; system fits industry standard 10 inch x 4.5 inch filter housings Learn More
    $254.99 Retail Price:  $286.06
  24. EV9797-20 Everpure Scale Inhibitor Feeder and Deliming System

    EV9797-20 Everpure Scale Inhibitor Feeder and Deliming System

    Fits standard 3/8-inch water lines Learn More
    $166.99 Retail Price:  $194.34
  25. Quad-MC2 Everpure Replacement Filter Cartridge Kit

    Quad-MC2 Everpure Replacement Filter Cartridge Kit

    Fits Everpure high flow CSR Quad-MC-2 systems Learn More
    $259.99 Retail Price:  $301.29

Items 1 to 25 of 209 total

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