Fresh, PureDrinking 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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Reverse Osmosis Water Filtration Systems

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OROS-50
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 (Standard)

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.Learn More
Easy Install/Maintenance
Easy system installation with quick connect tubing connections and our step-by-step installation and maintenance guide with full-color photos.View Manual
Customer Support
Free USA based customer service and technical support through email and phone for the entire lifespan of your Olympia reverse osmosis system.Contact Us
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.
Sediment Filter
5 micron polypropylene sediment filter removes sand, silt, dirt and rust particles.Carbon Block Filter
5 micron coconut shell carbon block filter removes chlorine, taste & odor, volatile organic carbon compounds, insecticides/pesticides and chemicals.*Carbon Block Filter
5 micron coconut shell carbon block filter removes chlorine, taste & odor, volatile organic carbon compounds, insecticides/pesticides and chemicals.*Reverse Osmosis Membrane
Removes the following contaminants: Arsenic, Barium, Cadmium, Chromium (Hexavelent & Trivalent), Copper, Turbidity, Fluoride, Lead, Radium 226/228, Selenium* & TDS.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.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.