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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. 55897C Halsey-Taylor Water Sentry VII Drinking Fountain Filter

    55897C Halsey-Taylor Water Sentry VII Drinking Fountain Filter

    Fits Elkay and Halsey-Taylor Water Sentry VII drinking fountains Learn More
  2. W9222900 Doulton Ceramic Water Filter

    W9222900 Doulton Slim Line SuperCarb Undersink Ceramic Water Filter

    Fits Doulton Short Mount Countertop, Undersink and Inline Water Filtration Systems Learn More
    $32.99 Retail Price:  $52.73
  3. W9222909 Doulton Imperial SuperCarb OBE Replacement Element

    W9222909 Doulton Imperial SuperCarb OBE Ceramic Water Filter

    Fits most standard 2.5-inch by 10-inch water filtration system housings Learn More
    $55.99 Retail Price:  $59.71
  4. CL6ROT33-A Omnipure GAC Inline Water Filter

    CL6ROT33-A Omnipure GAC Inline Water Filter

    Ideal for use in water coolers, drinking fountains, under sink systems, ice machines, and reverse osmosis systems Learn More
  5. 22160 Triton Replacement Sediment Filter Cartridge by Hydrologic

    22160 10-inch by 2.5-inch Triton Replacement Sediment Filter Cartridge by Hydrologic

    Fits most standard 10 inches x 2.5 inch housings Learn More
    $12.99 Retail Price:  $17.99
  6. K2586-KK Omnipure Inline Water Filter

    K2586-KK Omnipure Inline Water Filter

    Fits standard 3/8-inch copper and plastic water lines Learn More
    $12.99 Retail Price:  $17.99
  7. ICF-2512-ALK Hydronix Inline Coconut Carbon Filter Cartridge

    ICF-2512-ALK Hydronix Inline Coconut Carbon Filter Cartridge

    Fits most 1/4-inch standard water lines Learn More
    $31.99 Retail Price:  $50.99
  8. CB1-10 Pentek Carbon Block Water Filter Replacement

    CB1-10 Pentek Carbon Block Water Filter Replacement

    Fits most standard 10-inch x 2.5-inch housings Learn More
    $14.99 Retail Price:  $19.99
  9. DuPont WFRO60X Quick Twist Reverse Osmosis System

    DuPont WFRO60X Quick Twist Reverse Osmosis System

    $190.99 Retail Price:  $193.34
  10. DuPont WFQTR130004 Quick Twist Refrigerator/Icemaker Filter System
  11. K2528-KK Omnipure GAC Inline Water Filter

    K2528-KK Omnipure GAC Inline Water Filter

    Fits standard 3/8-inch water lines Learn More
    $11.99 Retail Price:  $17.99
  12. P195BN Cuno Water Filter Cartridge

    P195BN 3M Cuno Water Filter Cartridge

    Fits SGP195BN-T Espresso Filtration System Learn More
    $176.99 Retail Price:  $237.99
  13. CHLORPLUS-10 Pentek Whole House Filter Replacement Cartridge (12-Pack)

    CHLORPLUS-10 Pentek Whole House Filter Replacement Cartridge (12-Pack)

    Fits any standard housing that uses 9 3/4-inch x 2 1/2-inch replacement filter cartridges Learn More

    $215.99

  14. Pentek CHLORPLUS-10 Whole House Water Filter Replacement Cartridge

    CHLORPLUS-10 Pentek 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

    As Low As $18.00 Per Filter

  15. NCP-20BB Pentek Whole House Filter Replacement

    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

    As Low As $33.33 Per Filter

  16. EP-5 Pentek Replacement Filter Cartridge

    EP-5 Pentek Replacement Filter Cartridge

    Fits most housings that accept standard 5-inch x 2.5-inch water filter cartridges Learn More
    $6.99
  17. AP327 3M Aqua-Pure Water Filter Replacement Cartridge

    AP327 3M Aqua-Pure Undersink Filter Replacement Cartridge

    Fits 3M Aqua-Pure undersink water filter systems Learn More
    $37.99
  18. DW-2000-RB American Plumber Replacement Filter Cartridge

    DW-2000-RB American Plumber Replacement Filter Cartridge

    Fits American Plumber DW-1200, DW-2000 and select Culligan systems Learn More
    $59.99 Retail Price:  $61.28
  19. DW-200-R American Plumber Undersink Filter Replacement Cartridge

    DW-200-R American Plumber Undersink Filter Replacement Cartridge

    Fits Cuno AP-200 and PurWater PW-200 housings Learn More
    $18.99 Retail Price:  $21.15
  20. WIC-6A American Plumber Inline Icemaker Filter

    WIC-6A American Plumber Inline Icemaker Filter

    $13.99 Retail Price:  $14.94
  21. WICSA American Plumber Inline Filter with 1/4 inch Quick-Connect Fittings
  22. 100186 Amway eSpring Replacement Filter Cartridge

    100186 Amway eSpring Replacement Filter Cartridge

    Fits the eSpring Water Purifier Learn More
  23. 110194 Amway eSpring Replacement Filter Cartridge

    110194 Amway eSpring Replacement Filter Cartridge

    Fits the eSpring Carbon Water Treatment System Learn More
  24. 110720 Amway eSpring UV Water Purification System

    110720 Amway eSpring UV Water Purification System

    Fits standard 3/8-inch outside diameter x 1/4-inch inside diameter plastic or copper water line Learn More
  25. 3M Aqua-Pure AP200 Under Sink Water Filter

Items 1 to 25 of 176 total

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