APEC ROES-50 5-Stage Reverse Osmosis System Review

APEC Premium 5 Stage Reverse Drinking ReviewThe APEC ROES – 50 is one of the top selling reverse osmosis filtration systems (RO) systems on the market. The system produces 50 gallons of pure drinking water every day, which equates to a little over 2 gallons per hour. This output volume can vary depending on the water pressure and temperature – the lower the pressure and temperature, the lower the output and vice versa. The system is supplied with everything that you need to setup the system and change the filters, although some tools will be needed to install the unit (see Ease of Installation below).

There are 5 stages to the filtration system:

  • Stage 1 – Removes sediment including dust and rust. This also helps extend the life of the RO membrane.
  • Stage 2 and 3 – Carbon block filters that remove chlorine, odors, tastes and any discoloration or cloudiness, as well as VOC (volatile organic compounds) and other chemicals from the water.
  • Stage 4 – High rejection TFC RO membrane. This removes a wide range of contaminants including arsenic, bacteria, lead, fluoride, chromium, and radium among others.
  • Stage 5 – Coconut Shell Refining Carbon filter —removes any possible residual taste from the water before it enters the storage tank.

Follow this link to see a complete list of the contaminants that are removed.

Be sure to check out our guide to the best and most popular reverse osmosis accessories.

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Filtration System Design

The ROES – 50 is a filter/holder system. This means that all the filters and the membrane are removed from the filter holder and then a replacement filter is fitted back into the holder and the holder replaced.

The stage 1, 2 and 3 filters, which require replacement at between six and 12 months’ use (depending on the condition of the inflowing water) are loosened with a supplied “C” spanner wrench and then unscrewed by hand. The old filter element is removed and replaced with the new filter element, then the filter holder is screwed in and tightened with the “C” spanner.

Stage 4 (the RO membrane) and stage 5 filter elements are replaced at 2 to 3 year intervals, again depending on the quality of the inflowing water.

Water Efficiency

As with all RO systems, some incoming water is used to flush the RO membrane. This flushing water is often wasted. APEC suggests that the waste water can be used for watering gardens or filling ponds assuming you were to pipe the waste away. However, if you have fish in your pond, you may want to check the quality of the waste water  since the quantity of contaminants will be typically higher that would normally come out of your faucet.

The amount of water needed to flush the membrane varies depending on the incoming pressure of water, but typically with the APEC ROES – 50, 3 gallons is wasted for every 1 gallon of pure water produced.

Ease of Installation 4.3/5

The complete APEC ROES – 50 is a compact system that is designed to be installed in a small under counter space although it can be installed anywhere there is a convenient water feed line. The whole system is designed to be installed by a do it yourself of average skill level in about 1 hour with minimal tools that most households will already have. To help with installation, all of the tubes are color coded depending on where they connect to.

The system is designed to be installed where the water pressure coming into the filtration unit is between 40 to 85 psi. For lower water pressures, an alternative system of a pressure boosting pump may be needed.

The installation and user manual is quite detailed but it is worth taking a look at the following videos from APEC before you start since they do show how easy the system is to install.

Video 1 – Unpacking and checking the unit

Video 2 – Installing and fitting filter and membrane units

Video 3 – How to install the feed water and drain saddle adaptor

Video 4 – Installing the RO faucet

Video 5 –Connecting the tubing connections and system start up

The filters do not have an indicator to show when they need changing. The best way to check if the filters need changing to test the water occasionally with a TDS meter.


  • Up to 50 gallons of pure water produced each day
  • 4 stage filtration plus the RO filter
  • Designed for DIY install in about 1 hour
  • Competitively priced
  • Supplied with everything needed for a standard installation (including Teflon tape)
  • Filter life of between 6 to 12 months depending on condition of the feed water
  • Removes up to 99% of contaminants
  • 4 gallon pre-pressurized water storage tank
  • Optional UV filter
  • Manufactured in the US
  • US based technical support which is free for the lifetime of the product
  • 1 year limited manufacturer’s warranty


  • Filter canisters are more difficult to replace than modular filters
  • No remineralization stage to add back healthy minerals

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Conclusion 4.8/5

From our APEC ROES – 50 review, you can see why it is one of the bestselling RO filter systems in the US. While the filters are a little more difficult to replace than the modular filters on systems such as the Home Master TMAFC Artesian Full Contact  System, the cost of the ROES – 50 system is less than that of the Home Master system. The waste water produced per gallon of pure water is only 3 gallons vs. the 4 gallons wasted by the Home Master system (without a permeate pump). The significance of this additional gallon of wasted water may be a factor in the overall lifetime cost of the system.

For high quality, low price, and lower than average running costs, the ROES – 50 is a highly recommended RO filter system. Read more on our homepage.