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How Long Do Reverse Osmosis Filters Last?

Filters with reverse osmosis purification methods are getting popular day by day because of the degrading quality of water. However, it is a bad sign but these water purifiers can help you out. Reverse osmosis filters also known as RO filters are easy to use, install and save money. Moreover, they are fast and can remove 99% of water contaminants, including chemical compounds, heavy metals and bacteria.

How Long Do Reverse Osmosis Filters Last

Many of you may be thinking of buying a RO water filter. You are absolutely at the correct place. In this article we will let you know the exact lifespan of RO filters with some general information about these filters which is based on our global surveys.

Check out our article on top 10 best fluoride water filters of 2022 in this article all the listed filters use RO purification method.

How Long Do Reverse Osmosis Filters Last?

What Is RO?

RO is the shortened form of reverse osmosis. It is a purification method used in various water filters today. The water is passed through a semipermeable membrane also known as RO membrane in filters with pressure so that the contaminants are filtered out easily.

Reverse osmosis water purification methods can remove 99% of water contaminants, including heavy metals such as lead, zinc, copper, mercury hazardous chemical compounds, viruses and bacteria.

How to RO (Reverse Osmosis) Filters Work?

RO filters have filters which need to be replaced after a certain time period. There are different stages of filtration in the RO purification method. This is a long process with many filters in between so it takes some time to process. First of all RO filters have pre filter membranes which removes bigger impurities such as stones, sand and make sure the RO membrane will only get safe water.

How to RO (Reverse Osmosis) Filters Work

Now, when the water reaches the RO membrane, it is free of bigger contaminants. The water molecules are forced through this reverse osmotic semipermeable membrane with high pressure so the heavy metals such as lead, mercury, copper, zinc chromium and harmful chemical compounds such as fluoride, chlorine are removed.

After getting passed through the RO membrane now it’s time for the post filter, also called as carbon filter which makes sure there are no contaminants left in the water so that you can have safe and healthy drinking water. Many RO water filters also have a remineralization system which makes sure the good minerals such as calcium and magnesium are added in the water.

For What Time Do RO Filters Work Efficiently?

The lifespan of an RO filter totally depends on your usage and the time specified by its manufacturer. Reverse osmosis water purifiers can last until they are in excellent condition and with no breakage. Moreover, many manufacturers also have replacement and recycling programs so do make sure your purifier has the service. The filters inside the purifiers need to be changed frequently.

Depending on your manufacturer and your usage, the filter life may vary. Check out your water purifier user manual to know the exact time for which you can use the filter. Some filters can be used for a year, 6 months and some for only a month. Moreover, the water capacity such as 1000 gallons will be specified. Some RO water filters also come with an electronic indicator which tells the exact time to change the water filters.

Additionally, if your filter doesn’t have an indicator, change the filter as per the time specified by the manufacturer. If you don’t change the filters on time, the water quality will be degraded. Moreover, it will not be purified and taste bad. Therefore, replace those filters frequently.

You can store these filters for as long as you need. There is no expiry date for them until they are sealed in their pouch. Once you tear off its seal, you have to use it within the given time period. Otherwise it may get wasted. Moreover, do not use the filter for a long time. There is a possibility of mold growing inside it which can have serious health hazards.

Tips for Maintaining Your RO Filter

  • Keep the filter clean from outside as well as inside. Make sure you clean the water purifier at least once a month so the contaminants do not get accumulated inside the purifier for a longer time.
  • Change the RO filters as per the specified time period as it is good for your health and for the purifier too. Otherwise the water quality will get bad as the time goes. Check out our article on when to change a water purifier filter for a detailed guide.
  • Check for the leakages, if you can’t manage them on your own call a water filter technician or the brand help centre given on the user manual as soon as possible. Moreover, make sure you do its servicing on a monthly basis.


RO water filters come in a variety of shapes and sizes. Moreover, the price range is wide so that anyone can afford them. Check out our article on small water filter pitchers- top 10 best water filter pitchers of 2022. In this article we have given the exact time and some general information and maintenance tips for your RO filter. They are easy to use, can be maintained easily. Moreover, it is an excellent investment. However, RO purification techniques also filter out minerals such as calcium, magnesium which are important for our human body. Therefore, make sure your water filter has a remineralization system which adds these minerals in water again.

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