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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. 22105 Hydrologic SmallBoy Sediment Filter

    22105 Hydrologic SmallBoy Sediment Filter

    Fits 10 inch by 2.5 inch filtration system housings Learn More
    $8.99 Retail Price:  $12.06
  2. 22110 Hydrologic SmallBoy Replacement Carbon Filter - Green

    22110 Hydrologic SmallBoy Carbon Filter (Green)

    Fits filtration system housings that use 10 inch by 2.5 inch filter Learn More
    $18.99
  3. 22140 Hydrologic TallBoy Sediment Filter

    22140 Hydrologic TallBoy Sediment Filter

    Fits the HydroLogic TallBoy Filter housing and other filtration system housings that use 20 inch by 2.5 inch replacement filters Learn More
    $9.99 Retail Price:  $13.79
  4. 36005 Hydrologic SmallBoy De-Chlorinator and Sediment Filter System With Upgraded KDF
  5. 31050 Hydrologic TallBoy Sediment Filter & Dechlorinator

    31050 Hydrologic TallBoy Sediment Filter & Dechlorinator

    Built with a two-stage filtration and protected by a one year limited warranty Learn More
    $153.99 Retail Price:  $183.95
  6. 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
  7. Triton Water Filters Replacement Color Changing Di Cartridge Hydrologic 22016

    Triton Water Filters Replacement Color Changing Di Cartridge Hydrologic 22016

    Fits standard 10 inches x 2.5 inches housings Learn More
    $34.99 Retail Price:  $43.99
  8. 22155 Triton Water Filter Replacement Membrane by Hydrologic

    22155 Triton Water Replacement Membrane by Hydrologic

    For use with Triton Reverse Osmosis Systems Learn More
    $60.99 Retail Price:  $79.99
  9. 22120 Hydrologic Stealth RO 100GPD Membrane

    22120 Hydrologic Stealth RO 100GPD Membrane

    Fits 1/4-inch inline shut-off valve Learn More
    $59.99 Retail Price:  $64.99
  10. RO1000 Hydrologic Evolution Tankless Reverse Osmosis Filter System
  11. 22006 Hydrologic BigBoy Replacement Carbon Filter - Green

    22006 Hydrologic BigBoy Carbon Filter (Green)

    Regular Price: $80.99

    Special Price: $45.05

  12. 22010 Hydrologic BigBoy Replacement Sediment Filter

    22010 Hydrologic BigBoy Sediment Filter

    $44.99 Retail Price:  $57.49
  13. 22017 Hydrologic Replacement De-Ionization Cartridge

    22017 Hydrologic Deionization Filter Cartridge

    Fits 10 inch by 4.5 inch filtration system housings Learn More
    $56.99 Retail Price:  $71.29
  14. 22070 Hydrologic BigBoy Replacement Carbon Filter

    22070 Hydrologic BigBoy Replacement Carbon Filter

    Fits into water filtration housing systems that accept 20 x 4.5 inch filter cartridges Learn More
    $123.99
  15. 22125 Hydrologic Stealth-RO Replacement Sediment Filter

    22125 Hydrologic Stealth-RO Sediment Filter

    Fits the Stealth RO100/200 or filtration system housing that uses 10 inch by 2.5 inch filters Learn More
    $13.99 Retail Price:  $15.51
  16. 22045 Hydrologic Evolution Reverse Osmosis Membrane

    22045 Hydrologic Evolution Reverse Osmosis Membrane

    Fits the tankless Evolution RO1000 Reverse Osmosis System Learn More
    $153.99 Retail Price:  $179.39
  17. 31040 Hydrologic Stealth-RO200 Reverse Osmosis Water Filtration System

    31040 Hydrologic Stealth-RO200 Reverse Osmosis Water Filtration System

    Comes complete with easy installation kit Learn More
    $214.99 Retail Price:  $249.54
  18. 22043 KDF Hydrologic Carbon Pre-Filter For Evolution-RO1000

    22043 KDF Hydrologic Carbon Pre-Filter For Evolution-RO1000

    Fits Evolution RO1000 reverse osmosis water filtration systems Learn More
    $45.99 Retail Price:  $55.19
  19. 19026 Hydrologic Water Filtration System Pressure Gauge

    19026 Hydrologic Water Filtration System Pressure Gauge

    For use with the Evolution-RO1000 tankless reverse osmosis filtration system Learn More
    $31.99 Retail Price:  $39.09
  20. 26040 Hydrologic Reverse Osmosis Membrane Flush Kit

    26040 Hydrologic Reverse Osmosis Membrane Flush Kit

    For use with the HydroLogic Stealth RO1000, RO200 and other standard reverse osmosis filtration systems Learn More
    $15.99 Retail Price:  $19.00
  21. 27020 Hydrologic Reverse Osmosis System Float Valve

    27020 Hydrologic Reverse Osmosis System Float Valve

    For use with the Evolution-RO1000 tankless reverse osmosis filtration system Learn More
    $18.99 Retail Price:  $19.00
  22. 31035 Hydrologic Stealth-RO100 Reverse Osmosis Filtration System

    31035 Hydrologic Stealth-RO100 Reverse Osmosis Filtration System

    Includes everything needed for installation Learn More
    $164.99 Retail Price:  $225.00
  23. 35010 Hydrologic UV Water Sterilizer For Reverse Osmosis Systems

    35010 Hydrologic UV Water Sterilizer For Reverse Osmosis Systems

    For use with the Merlin-GP or Evolution-RO1000 reverse osmosis filtration systems Learn More
    $98.99 Retail Price:  $114.14
  24. 22080 Hydrologic Reverse Osmosis Carbon Pre-Filter

    22080 Hydrologic Reverse Osmosis Carbon Pre-Filter

    Fits the Merlin-Garden Pro Water Filter System Learn More
  25. 25057 Hydrologic Reverse Osmosis Water Filter Tubing

    25057 Hydrologic Reverse Osmosis Water Filter Tubing

    Contains 50 feet of 3/8 inch tubing Learn More
    $16.99 Retail Price:  $23.99

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