Discount Water Filters and Air Filters at Discount Filter Store.com

When we protect your filter purchase with our No Worries Guarantee, we mean it!

No Worries...
  • Your filters are guaranteed to be the right fit!
  • Our products are price match guaranteed!
  • Our customer service team is guaranteed to answer your call!
  • You’re guaranteed to find expert help!

Learn more about our No Worries Guarantee

Reverse Osmosis Filters & Systems

Reverse Osmosis: a water purification technology that utilizes a semi-permeable membrane to remove microscopic particles (typically anything larger than 0.001 microns in size) from drinking water.

Select what type of reverse osmosis filter part you’re searching for (system, filter, etc.) and browse or search through hundreds of our reverse osmosis water filters, systems, membranes, and other water filter parts. Choose from some of the industry’s top reverse osmosis brands including, Watts®, Hydrologic, Hydrotech, and Water Factory Systems.

Not sure if investing in a reverse osmosis water filter is what you want, then check out our thousands of other popular water filters, including whole house, under sink, faucet filters, and many more.

Clear All
Compare

28 Item(s)

Grid  List 

Set Ascending Direction
  • 54846 Tier1 Reverse Osmosis Tank Pressure Gauge

    54846 Tier1 Reverse Osmosis Tank Pressure Gauge

    $8.99
    MSRP: $12.64
    Save 29%
  • 6570090 Tier1 Plastic Tank Ball Valve
  • 6570590 Tier1 Plastic Tank Ball Valve

    6570590 Tier1 Plastic Tank Ball Valve

    $6.99
    MSRP: $10.34
    Save 32%
  • RC540T50-T Tier1 Countertop Reverse Osmosis Filter System
  • TPG-100 Tier1 Reverse Osmosis Tank Pressure Gauge
  • RO-1070-W14 Reverse Osmosis Bladder Tank - 14 Gallon

    RO-1070-W14 Reverse Osmosis Bladder Tank - 14 Gallon

    $136.99
    MSRP: $159.84
    Save 14%
  • 5-Stage Reverse Osmosis System by Tier1

    5-Stage Reverse Osmosis System by Tier1

    $159.99
    MSRP: $249.99
    Save 36%
  • ROQC-450 Tier1 4-Stage Quick Change Reverse Osmosis Water Filter System
  • TFM-18-A Tier1 Reverse Osmosis Membrane

    TFM-18-A Tier1 Reverse Osmosis Membrane

    $35.99
    MSRP: $45.99
    Save 22%
  • TFM-36-A Tier1 Reverse Osmosis Membrane

    TFM-36-A Tier1 Reverse Osmosis Membrane

    $36.99
    MSRP: $49.99
    Save 26%
  • TFM-50-A Tier1 Reverse Osmosis Membrane

    TFM-50-A Tier1 Reverse Osmosis Membrane

    $45.99
    MSRP: $55.19
    Save 17%
  • Tier1 TROM-100 RO Membrane
  • HDG-CB-AC10 Hydronix Comparable PRE-RO Carbon Block Reverse Osmosis Filter by Tier1
  • TFM-18 Desal Compatible Reverse Osmosis Membrane by Tier1

    TFM-18 Desal Compatible Reverse Osmosis Membrane by Tier1

    $35.99 MSRP: $45.99
    Save 22%
  • ROM-100 Campbell Comparable Reverse Osmosis Membrane by Tier1
  • RF-63 Honeywell Comparable Reverse Osmosis Membrane by Tier1
  • TFM-36 Desal Comparable Reverse Osmosis Membrane by Tier1

    TFM-36 Desal Comparable Reverse Osmosis Membrane by Tier1

    $36.99 MSRP: $49.99
    Save 26%
  • FX12M GE Comparable Reverse Osmosis Membrane by Tier1

    FX12M GE Comparable Reverse Osmosis Membrane by Tier1

    $36.99 MSRP: $49.99
    Save 26%
  • TFM-36 Axeon Comparable Reverse Osmosis Membrane by Tier1

    TFM-36 Axeon Comparable Reverse Osmosis Membrane by Tier1

    $36.99 MSRP: $49.99
    Save 26%
  • TW30-1812-36 Filmtec Comparable Reverse Osmosis Membrane by Tier1
  • MEM-45 APEC Comparable Reverse Osmosis Membrane by Tier1

    MEM-45 APEC Comparable Reverse Osmosis Membrane by Tier1

    $36.99 MSRP: $49.99
    Save 26%
  • AG1812TAE GE Comparable Reverse Osmosis Membrane by Tier1

    AG1812TAE GE Comparable Reverse Osmosis Membrane by Tier1

    $36.99 MSRP: $49.99
    Save 26%
  • TLC-36 Pentair Comparable Reverse Osmosis Membrane by Tier1
  • W-1812-36 Watts Comparable Reverse Osmosis Membrane by Tier1
  • TFM-50 Comparable Reverse Osmosis Membrane by Tier1

    TFM-50 Comparable Reverse Osmosis Membrane by Tier1

    $45.99 MSRP: $55.19
    Save 17%
  • TW30-1812-50 Watts Comparable Reverse Osmosis Membrane by Tier1
  • TW30-1812-50 Filmtec Comparable Reverse Osmosis Membrane by Tier1
  • TF-1812-50 Axeon Comparable Reverse Osmosis Membrane by Tier1

28 Item(s)

Grid  List 

Set Ascending Direction
Scroll To Top