Pro Tips To Maintain Whole House Reverse Osmosis System

Maintenance of the reverse osmosis (RO) system is essential to function correctly, and its needs more care than just replacing and repairing the parts. Also, maintaining the RO system can reduce and prevent problems from occurring.

Maintenance of RO system includes different processes but replacing its Filters is the main component of the system maintenance. The cleaning and sanitizing of the system are also necessary. Also, for better results, you should check storage tank pressure.

A reverse osmosis system will provide you with healthy, safe, and best drinking if adequately maintained. And it is essential to know about the steps of maintenance. Therefore, this guide will explain how to keep the RO system well maintained. So let’s jump into it.

Premium Tips To Maintain Whole House Reverse Osmosis System

We’ve enlisted a few helpful tips to keep your reverse osmosis system working at its best.

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Filter Changes Of RO System

reverse osmosis system maintenance

The most important maintenance of the RO system is its filter change. These filters include Pre and Post Filters. Changing filters frequently at their exact time is highly recommended for better results.

Although it also depends upon your water, how often you consume water depends on the type of water which water you are using.

For Example, Hard water or high sediment levels in well water can result in the pre-filter elements’ deterioration. As a result, the filter will need to be replaced sooner.

However, research indicates Carbon pre-filters should be replaced after 6 to 12 months. A Carbon post-filter can be replaced after two years.

Furthermore, cheap filters may require more frequent replacement since they tend to wear out faster.

Sediment-Pre Filter

The pre-filter used in Stage 1 of almost all reverse osmosis water filter systems is a sediment pre-filter. Its replacement is directly related to the whole house reverse osmosis system maintenance.

Essentially, the filter is designed to prevent dirt, rust, silt, and other types of debris from clogging the RO membrane.

Every six to twelve months, you should replace the sediment pre-filter.

Carbon Pre-Filters

Carbon pre-filters are often used at stages 2 and 3. Chemicals can be removed from water using activated carbon or charcoal.

Membranes based on thin-film composite (TFC) materials are particularly susceptible to free chlorine. Carbon pre-filters should be replaced every six to twelve months, whether they are block or granular.

Besides removing chlorine, it can also remove other disinfectants that could affect the performance of the reverse osmosis membrane. 

Carbon Post-Filter

Replacing Carbon Post-Filter is the central part of Whole house reverse osmosis system maintenance. 

Carbon Post-Filter is used at stages 4 and 5 of filtration. The device’s purpose is to make your water purer just before it comes out of the faucet. The remaining bad tastes and odors will be removed from the water by carbon in the pressure tank.

It is recommended to change carbon post-filters every 12 months. In some cases, they may last up to two years.

How To Change The Filters

Changing the filter without care and proper method could lead to damage or any other loss. So, it’s essential to learn the appropriate form of filter replacement.

Follow these steps to replace your filter properly:

  • Close the water valves for the storage tank and the water supply.
  • Remove pressure from the system.
  • Take out the filters/membrane from their housings.
  • Attach the new elements to the housings and screw them back in place.
  • Open the tank valve and turn on the water supply.
  • Let the system flush for a few minutes after opening the RO faucet. Let the tank refill by closing the faucet.

Note: Before using, discard 1 or 2 full tanks of water.

RO Membrane Replacement

how to change reverse osmosis membrane

RO membrane is the semi-permeable membrane that stops the flow of most dissolved salts, bacteria, pyrogens, and organic.

When the solution is on one side of the membrane, this membrane applies pressure to the solution and filters the dissolved salts and other impurities.

Changing the RO membrane regularly will provide you with excellent drinking water. However, it is not difficult to change the RO membrane. You have to do it once every 3 to 5 years.

How To Change Your RO Membrane?

To change your RO membrane properly, you should follow these steps:

  1. First step is to ensure that the RO unit is turned off
  2. Now, you have to remove the RO membrane housing from its clips. You will be able to disconnect the membrane housing by pulling up and away from the unit, 
  3. After that, you have to remove the tubes from the R/D unit’s fittings. If you remove only the box on the RO/DI unit’s cap end, you can still get the job done, but it is much easier to remove the entire housing.
  4. You need to unscrew the cap from the membrane housing after removing the membrane housing.
  5. Installing the new membrane will be the opposite of removing it. The tubes can now be connected more easily.
  6. The membrane housing should now be pushed back into the membrane clips. If you align the accommodation with the two pins and push down firmly, it will snap into place.

Note: Keep an eye on the two O-rings on the membrane housing.

System Sanitizing And Cleaning

It is not always necessary to clean and sanitize a reverse osmosis system, but it will result in optimum performance. Also, it is not much time-consuming, so it will be easy for you to do.

How To Sanitize And Clean RO System

To clean and sanitize your RO system correctly, you have to follow these steps:

  1. First of all, shut off the water supply and remove the pressure from the system. Also, you have to remove all the filters and membranes from their housing.
  2. Secondly, wash the inside of the housings with warm dishwater. Rinse them afterward.
  3. Fill the housing of the filter stage one with unscented household bleach or another suitable sanitizer.
  4. Now screw back all the housing and turn on the water supply. Also, open the RO faucet to let water out. Once done, close it.

Checking RO System Storage Tank Pressure

The water tank inside your reverse osmosis system needs to be periodically checked and re-pressurized if necessary as part of regular RO maintenance.

You have to maintain the proper pressure since this directly affects how well your RO system works and performs and how rapidly water flows from it.

Note: The pressure should be between 6 and 8 psi.

How to Re-Pressurize a Reverse Osmosis Tank?

  1. You should shut off the water supply to the RO system and ensure there is no more water entering it.
  2. Make sure the tank is empty before turning on the tap.
  3. Remove the valve stem covering from the valve stem. Two valves are located on the water tank. One is called the air pressure valve, and the other is the reverse osmosis membrane valve. Make sure the valve that goes to the membrane is not removed.
  4. Use a PSI gauge to check the pressure in your tank. For a 2-4 gallon tank, the ideal pressure should be between 6 and 8 PSI.
  5. If the PSI is less than 6, you can use an air compressor or bicycle pump to pump air back into the valve until at least 6-7.
  6. Let the water flow into your tank from the membrane once the PSI has normalized. Close the valve and the water faucet.

Caution: Try not to over pressurize.


What does RO filter not remove?

RO systems will not remove some solvents, pesticides, volatile organic chemicals (VOCs), etc.

How long are reverse osmosis filters suitable for?

Between two and five years is the lifespan of the reverse osmosis membrane. Usually, the other filters must be replaced much more often.

How do I know if my reverse osmosis filter is terrible?

It will provide bad taste water with a foul odor. Also, the flow of water decreases. Leakage is also the indication of filter change.


Remember, maintenance of the RO system is the key to tasty, healthy, and safe drinking water. Above are the best methods for RO system maintenance.

After reading the above information and guides, hopefully, you should maintain your RO system properly to get healthy, safe, and drinking water.

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