Olympia Water Systems OROS-50 Review (2023)

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🧾 Overview

With 5 stages of water filtration, the Olympia Water Systems OROS-50 is NSF certified for assured production of high-quality reverse osmosis drinking water.

The system uses a 50GPD membrane and includes a pre-installed flow restrictor and shut-off valve to minimize water waste and speed up the RO process.

With quick connect fittings and color coordinated tubing, the Olympia Water Systems OROS-50 can be installed at home by the user.

The system is structured to fit in a standard under sink space and is compact and streamlined in design. The filtration and reverse osmosis processes in this filter removes common contaminants like bacteria, viruses, chlorine, lead, and sediment from drinking water.

💡 Features

Sediment filter

The system’s 5 micron polypropylene sediment filter eliminates sand, silt, dirt and rust particles from the water. This protects and improves the efficiency of the RO membrane by preventing blockages and filter damage.

2 carbon block filters

The system contains 2 coconut shell 5 micron carbon block filters to remove organic carbon compounds, insecticides and pesticides, and any other chemicals that may affect water taste or odor.

The filters also reduce chlorine and chloramine content. Running the water through 2 separate filters allows for a more thorough filtration process.

Reverse osmosis membrane

At the center of this water filter is a reverse osmosis membrane, intended for the removal of fluoride, selenium, barium, radium, and other total dissolved solids. The system forces water at a high pressure through the membrane, trapping these particles and leaving only pure water on the other side.

Post carbon filter

Before reaching the faucet for drinking, this RO system filters water through a post carbon filter for a final cleanse. This removes any small particles that may have passed through the RO membrane and eliminates tastes and odors that water may have picked up from the storage tank.

3.2 gallon storage tank

The system uses a standard size 3.2. gallon storage tank for holding filtered RO water that can be used immediately when the faucet is turned on. When water is lost from the tank, the system will automatically produce more RO water to refill it.

Designer chrome faucet

The RO unit’s premium quality chrome faucet is lead-free, preventing additional contaminants from being added to water before it reaches a drinking glass. The faucet is non-air gap and comes with a ceramic disk valve and swivel spout for convenient use.

Flow restrictor and automatic shut-off valve

To minimize water waste, the system includes a built-in flow restrictor that prevents backflow of water through the RO membrane. Also included is an automatic shut-off valve, which stops the system from producing RO water when the tank is full. This again prevents unnecessary wastewater production.

Olympia Water Systems OROS-50 features

🚦 Performance

The Olympia Water Systems OROS-50 produces pure water using a 50 GPD membrane.

The filter has been certified by the NSF for efficiently reducing chlorine, taste, odor and total dissolved solids.

5 stages of filtration, including 2 carbon filter stages, allow for the most comprehensive removal of contaminants from drinking water.

Operating with household water pressure of between 50 and 100 PSI, the Olympia Water Systems OROS-50 produces clean RO water at a ratio of 1:4.

This means that 4 gallons of water are lost for every 1 gallon of pure RO water that’s produced, which is the standard ratio for most RO systems without a booster pump.

The system only wastes water while it is producing RO water, after which the water is shut off to prevent wastage.

Olympia Water Systems OROS-50 5-Stage Reverse Osmosis Water Filtration System

🔧 Installation & Maintenance

The Olympia Water Systems OROS-50 comes with its 5 filters and filter housing, a 3.2 gallon storage tank, chrome finish faucet, tubing, housing wrenches and quick connect fittings.

The system is designed for at-home installation, and most users should be able to carry out the task themselves.

Included in the system manual is the system maintenance schedule and filter replacement record sheet, to give users more insight into the cleaning and maintenance the system requires.

The filters and membrane don’t require cleaning, as they’ll need changing every 6 months to 2 years instead. The Olympia Water Systems OROS-50 is anti-leak, minimizing the need for repair.

Olympia Water Systems OROS-50 review

📝 Filter Info

Included with the Olympia Water Systems OROS-50 are 5 filters: a sediment filter, two carbon block filters, a reverse osmosis membrane and a post carbon membrane.

Each filter is essential for the most effective purification of drinking water, and the system can’t function without all filters in place.

After around a year, depending on water usage and wear-and-tear, filters won’t work as effectively at removing contaminants from water. Users will need to purchase new filers either separately or in a package of 5 from the manufacturer’s website or other online marketplaces.

The RO membrane will last for up to 2 years, while the filters will need changing after around 6 months to a year. Users can test water TDS levels to determine when filters are performing less effectively.

Olympia Water Systems OROS-50 filters

🔔 Pros & Cons


  • Good customer support for prospective buyers and users who have purchased this filter. Manufacturer can be contacted easily for personal assistance should a user have any questions about a product.
  • Installation is fairly straightforward and can generally be carried out on its own. The system comes with a handy guide for product assembly and maintenance and cleaning instructions for long-term upkeep. Quick-connect fittings and color-coded caps and tubing simplify installation for DIY set-up.
  • Two carbon block filters provide a more thorough water cleansing process, removing more impurities and contaminants for cleaner, purer drinking water with an improved taste and odor.


  • For users with a low household water pressure, water flow in this system may not be at a desired rate. Users should consider purchasing a booster pump to get the most out of their filter if water pressure is below 40 PSI.
  • Users looking to add minerals to their RO water will need to purchase a separate filter as this unit does not feature a built-in filter for remineralization purposes.
  • Installation may prove difficult for users who are less mechanically skilled. A plumber or a handyman can be hired to carry out the job, but at an extra cost.

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  • Laura Shallcross
    Senior Editor

    Laura is a passionate residential water treatment journalist who holds an undergraduate degree in Print Journalism and a master’s degree in Creative Writing. Over a span of 5 years she's written on a range of topics including water softening, well water treatment, and purification processes.

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