Do I Really Need to Soak My New RO Membrane? Find Out Here

If you’ve recently purchased a new reverse osmosis (RO) membrane or are considering investing in one, you may wonder if it’s necessary to soak it before usage. While some manufacturers recommend this step, others claim it’s not required. In this blog post, we will delve into the reasons behind soaking an RO membrane, the potential benefits, how to soak it, and factors to consider. So, if you’re curious whether you need to soak your new RO membrane, keep reading to find the answer.

Soak a New RO Membrane

Do I need to soak my new RO membrane?

When you put in a new reverse osmosis (RO) membrane, it’s a good idea to soak it first. This helps eliminate any leftovers from making it, so it works its best. How long to soak it can vary. Some say to soak it for 24 hours, while others suggest running water through it. You can do this with the system’s flush valve or by running water normally without the deionization (DI) canisters. Soaking is important when you first use a new RO membrane. It helps the membrane work right and lowers the water’s total dissolved solids (TDS).

Why soaking is necessary for a new RO membrane?

Soaking a new RO membrane is necessary for several reasons. Firstly, it helps to remove any preservatives or chemicals on the membrane’s surface. Additionally, soaking allows the membrane to hydrate to ensure its optimal performance and efficiency. Lastly, soaking also helps remove any manufacturing residues accumulated during production.

Preventing Dry Out

Dry out can cause irreversible damage to the membrane, resulting in reduced water production and poor water quality from the RO system. Soaking the membrane before startup ensures it remains hydrated and prevents potential dry-out issues. This simple step can go a long way in prolonging the lifespan of the RO membrane and ensuring optimal water filtration.

Removing Chemical Residues

The chemical residues left over from the manufacturing process can hurt the performance and efficiency of the membrane. By soaking the membrane, you can effectively dissolve and remove these chemical residues, resulting in better water quality from your RO system. Moreover, removing chemical residues through soaking also plays a significant role in maintaining the long-term durability of the RO membrane, ensuring its optimal performance for an extended period.

How to Properly Soak a New RO Membrane

Before using your new RO membrane, clean and rinse it well to remove any dirt or debris. This is important because any leftover dirt can reduce its effectiveness. Take off any protective wrapping or covers from the membrane before soaking it. These covers are just for shipping and can get in the way of the soaking. Once the membrane is clean and uncovered, use a clean container filled with RO water or a special soaking solution for membranes. This step helps clean the membrane more and gets it ready to work well. Finally, carefully put the membrane into the container, ensuring the solution covers it completely. This will ensure the membrane is well-soaked and ready for your RO system.

Preparing the RO Membrane for Soaking

Before soaking a new RO membrane, it’s important to prepare it correctly. First, rinse the membrane with clean water to remove preservatives or dirt. This makes sure the membrane is clean for soaking. Also, check the membrane for any damage or problems. If you find any, fix them before soaking them to avoid more damage. Make sure to read any instructions from the manufacturer on how to prepare the membrane for soaking. This can help the membrane work at its best. Finally, check that all connections are tight before soaking to avoid leaks.

The Soaking Process

To properly soak a new RO membrane, allowing it to soak in the recommended solution for at least 4 hours is recommended. During this time, gently agitating the container occasionally can help enhance cleaning and improve the membrane’s performance. Maintaining proper temperature conditions as specified by the manufacturer during the soaking process is important. Additionally, it is crucial to avoid exposing the soaked membrane to direct sunlight or extreme temperatures to prevent any damage. Following these guidelines ensures your new RO membrane is effectively soaked and ready for optimal performance.

Duration of Soaking

To soak a new RO membrane, leave it in the solution for 4 to 24 hours. This time helps the membrane fully absorb the solution and get properly hydrated. If the membrane has been stored for a long time, you might need to soak it longer. This makes sure all chemicals or dirt are washed away. Always check the manufacturer’s instructions for the exact time to soak. After soaking, throw away the used solution as per local rules. This is important for the environment and for the soak to work well.

Factors to Consider when Soaking a New RO Membrane

Quality of RO Membrane

When deciding whether to soak your RO membrane, consider its quality. Soaking is good for lower-quality membranes. It cleans them and makes them work better, leading to cleaner water. High-quality membranes might not need soaking because they’re often pre-treated. But, always check the manufacturer’s instructions to see if soaking is needed for your membrane. This helps you prepare it correctly and ensure it works well in your RO system.

Water Temperature and pH Level

Warmer water usually cleans the membrane better by removing impurities more efficiently. It’s key to use water at the right temperature. Also, keeping the right pH level is essential during soaking. The pH affects how well the cleaning works and the condition of the membrane. Too hot or cold temperatures, or very high or low pH levels, can harm the membrane. Follow the manufacturer’s instructions for the right temperature and pH when soaking. Before soaking, check the water’s temperature and pH to ensure they are ideal for cleaning your new RO membrane.

Pre-Soaking Maintenance

Before soaking your RO membrane, clear away any loose debris or particles. This helps the membrane soak up the solution better without blockages. Changing pre-filters before installing the membrane can also help. This reduces the dirt in the water and may make soaking less needed, saving time. Also, check and clean the membrane housing and other parts before soaking. This finds any problems that could affect soaking. Following the right steps before soaking, including the manufacturer’s instructions, prevents issues and makes the soaking more effective. Doing these things ensures your new RO membrane is ready to work well and last longer in your RO system.


Soaking your new RO membrane is essential for allowing it to reach its full potential in filtration efficiency. This process helps remove any preservatives or sanitizing agents that may have been used during manufacturing, thus ensuring that the water taste and quality are not affected. Moreover, the soaking period gives the membrane ample time to stabilize and expand fully, resulting in optimal performance. Studies have shown that properly soaked membranes have better contaminant rejection rates, producing cleaner and safer drinking water. Therefore, taking the time to soak your new RO membrane is crucial for maximizing its effectiveness and ensuring filtered water quality.

Frequently Asked Questions

What happens if I don’t soak my new RO membrane?

If you don’t soak your new RO membrane, cleaning the water might not work as well. Not soaking it can slow the water filtering, so you get less clean water. Also, the membrane might get dirty faster without soaking, meaning you’ll have to clean or replace it more often.

Can I use my new RO membrane without soaking it?

No, using a new RO membrane without soaking is not recommended. By skipping the soaking process, you risk reduced filtration efficiency and a shorter lifespan for your membrane.

Are there any alternatives to soaking a new RO membrane?

Soaking a new RO membrane is usually suggested, but other ways exist to get it ready for use. You can do a chemical cleaning to remove impurities and make the membrane work well. Or, you can skip soaking and install the membrane. Also, some makers sell already-soaked or prepared membranes, saving you time when installing them.

Share this article:

Leave a Comment

Your email address will not be published. Required fields are marked *

Related Products

PVDF Curtain Hollow Fiber Membrane pic

Latest Posts

Free Quote

Free Quote

contact us

If you are interested in our products, don’t hesitate to contact us! You can contact us in any way that is convenient for you. We are available 24/7 via fax or email. You can also use the quick contact form below or visit our office. We would be happy to answer your questions.

Contact Form Demo
Scroll to Top

Get a free quote

Contact Form Demo