How to Get Air Out of a Reverse Osmosis System

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Strange sound coming from your RO system? Or your filtered water looks cloudy or milky?

You could have some air trapped in there!

Luckily it is a very easy fix to get that air out of a reverse osmosis system and solve the problem. Here is how!

Key Takeaways

  • To get trapped air out of a reverse osmosis system, you need to open the faucet and flush the system while tilting it at a 45-degree angle.
  • You can also try removing the flow restrictor for 15 minutes and allow the RO membrane to flush.

How to Get Air Out of a Reverse Osmosis System

To address any air or air bubbles in your RO system, it’s necessary to release the trapped air within it.

  1. Begin by shutting off the storage tank valve and turning on your RO faucet.
  2. Allow the faucet to remain open for several minutes. During this process, tilt the system module at a 45-degree angle to facilitate water drainage, enabling the air bubbles to escape along with the water.

Another method is removing the flow restrictor from the drain line and flushing the RO membrane for 15 minutes. This approach can help release any air that might be trapped within the RO membrane itself.

plumber installing reverse osmosis system under sink

Why Is There Air in My RO System to Begin with?

Air bubbles can find their way into a reverse osmosis system through various means. Identifying and addressing these potential sources will help ensure that your RO system functions efficiently and produces clear, clean water.

Air in the Source Water

One possibility is the presence of air within your plumbing system (e.g., air pockets might form due to a recent maintenance procedure). Damaged pipes or storage tanks could also be responsible for introducing air into the system.

Newly Installed Filters/Systems

Newly installed RO replacement filters or an entirely new reverse osmosis system can also introduce air.

Improperly Installed Reverse Osmosis System

Inspecting all fittings and valves for leaks is a standard part of any maintenance procedure, as small gaps from improper installation can allow air to enter the RO system.

If you have any questions about how to get air out of a reverse osmosis system please don’t hesitate to leave a comment below!

About the Author Alexandra Uta

Alex is a content writer with an affinity for research and a methodical attention to detail. Since 2020, she has fully immersed herself into the home water treatment industry only to become an expert herself. Alex has been using water filters and similar products for years which has gained her lots of hands-on experience.
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