Fresh, Pure
Drinking Water

Olympia® Water Systems Reverse Osmosis water filter systems were designed and tested to provide clean, high quality drinking water at your home or business.

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Olympia Reverse Osmosis Systems

Reverse Osmosis Water Filtration Systems

OROS-50 Reverse Osmosis System
Most Popular


The Olympia® Water Systems OROS-50 undersink reverse osmosis system is ideal for most small households and businesses.
  • 5-Stages of Filtration
  • 50 Gallons per Day (GPD) Membrane
Available Faucet Finishes
chrome faucet
Chrome (Standard)
oil rubbed bronze faucet
Oil Rubbed Bronze
Selecting a Reverse Osmosis System
Olympia® Water Systems offers high quality undersink reverse osmosis systems to suit everyone.

High Quality Water

Our reverse osmosis systems remove impurities and contaminants from the water in your home or business to produce fresh, pure drinking water.

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Easy Install/Maintenance

Easy system installation with quick connect tubing connections and our step-by-step installation and maintenance guide with full-color photos.

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Customer Support

Free USA based customer service and technical support through email and phone for the entire lifespan of your Olympia reverse osmosis system.

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Great Tasting Filtered Drinking Water

5 Stages of Filtration
Each Olympia® undersink reverse osmosis system includes these 5 stages of filtration: 5 micron sediment filter (stage 1), 5 micron carbon block filters (stages 2 & 3), reverse osmosis membrane (stage 4) and post-carbon filter (stage 5). As shown in the diagram below, these 5 stages of filtration purify tap water and well water to provide clean, high-quality drinking water.
Olympia Reverse Osmosis Stages of Filtration
  1. Sediment Filter

    5 micron polypropylene sediment filter removes sand, silt, dirt and rust particles.
  2. Carbon Block Filter

    5 micron coconut shell carbon block filter removes chlorine, taste & odor, volatile organic carbon compounds, insecticides/pesticides and chemicals.*
  3. Carbon Block Filter

    5 micron coconut shell carbon block filter removes chlorine, taste & odor, volatile organic carbon compounds, insecticides/pesticides and chemicals.*
  4. Reverse Osmosis Membrane

    Removes the following contaminants: Arsenic, Barium, Cadmium, Chromium (Hexavelent & Trivalent), Copper, Turbidity, Fluoride, Lead, Radium 226/228, Selenium* & TDS.
  5. Post Carbon Filter

    Coconut shell post carbon filter reduces chlorine, taste & odor.
*These claims are based on manufacturer testing. These claims are not certified by NSF.

Olympia® Reverse Osmosis System Filters

Olympia® under-sink reverse osmosis systems were designed to ensure ease of use and low maintenance. Olympia replacement filters are high quality, easy install filters that have been tested specifically with the Olympia reverse osmosis systems. If the filters are changed regularly as suggested below, your Olympia reverse osmosis system should provide you with clean, filtered drinking water for many years.
Replace Every 1-2 Years
Olympia Post Carbon Filter
Post-Carbon Filter
Replace Every 2-3 Years
Olympia Reverse Osmosis Membrane
RO Membrane
Time to Change Your RO System Filters?
Olympia Water Systems replacement filters are available for online purchase individually and also in a variety of convenient filter packs.
OROS-50 and OROS-80 have been Tested and Certified by NSF International against NSF/ANSI 42 for the reduction of Chlorine, Taste and Odor and 58 for the reduction of Total Dissolved Solids. Please refer to the Performance Data Sheet for complete reduction data.

About NSF International

NSF International is a global independent organization that writes standards and protocols, and tests and certifies products for the food, water and consumer goods industries to minimize adverse health effects and protect the environment. NSF operates in over 165 countries. Founded in 1944, NSF is a Pan American Health Organization/World Health Organization Collaborating Center on Food Safety, Water Quality and Indoor Environment. To receive certification, Olympia Water Systems submitted product samples to NSF that underwent rigorous testing to recognized standards, and agreed to unannounced manufacturing facility audits and periodic retesting to verify continued conformance to the standards. Find us in the NSF water listings by visiting