How To Know Its Time To Replace Your RO Membrane and Other Filters


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The water purifier has become an essential part of our day-to-day life, and due to this, the work of your water purifier has become very tough. Your water purifier works 24/7, seven days per week. In comparing this situation to humans, if humans work all day a week, we might get sick out of exhaustion and might, stop working so efficiently, and may fall sick. Similarly, every object and thing on the planet has its expiry date, so appliances or gadgets also. Water purifiers work 24/7 every day for weeks, months, and years; therefore, it is very obvious that after a specific time, they might stop working so efficiently. Generally, water purifiers don’t have an expiry date, unlike humans and other living organisms, but they have an update date just like any other object available to us. Generally, the best way to know if your water purifier is not working so efficiently is to check the water flow of the RO system, whether the water flow is weaker than it used to be or to check whether your RO system stopped producing the expected amount of water it used to be.


There are a few tips to know if your RO membrane needs to be replaced or not. To get to know when your water purifier needs an update, you should take a closer look at the mentioned points below:


1.Level of impurities in the input water:

The filter of the water purifier should ideally be changed every 3-4 months; also the filter and membrane Changement depends upon the quality and quantity of water being filtered. Apart from the quality and quantity filter and membrane replacement also depend upon which type of filter you are using:

    • If it is a RO pre-filter (installed outside the RO water purifier), then ideally the filter should be replaced every 3-4 months.
  • If it is a Sediment Filter, then the membrane should be changed every 6-12 months depending upon the amount of water it is purifying and its quality, as in, how bad the water is being input for the filtration. A sediment filter is a filter specially designed to remove dirt and sediments from the water when it comes to water quality for filtration, the term that is very common in this sector is the TDS level. A TDS (Total dissolved solids) level is the approximate measurement of solids that are present in the water and it is measured as a volume of water whose unit is milligrams per liter (mg/L). It is important to keep the pressure high of the water that is going into the membrane. It is recommended to change the sediment filter on time, if not the dirt will clog the RO membrane and this will result in the efficiency reduction of the filter. If the TDS level is between 50-150, it is considered acceptable and suitable for drinking purposes. And if the TDS level is about 1000ppm, it is unsafe and unfit for humans to consume.
  • A Carbon Filter is a water filter that uses an activated carbon filter that removes chlorine and other organic contaminants. A carbon filter also filters out the bad odor and the bad taste of the water. It is very important to change the RO membrane to prevent water from bad and bad odors.


2.TDS Level or hardness of the input water:

Reverse osmosis is one of the best available technology for purifying water, especially water containing high TDS levels (Total dissolved solids). Water with TDS levels of more than 500 ppm can also be purified using RO technology, RO or Reverse Osmosis technology is a separation technology where dissolved and invisible water impurities get separated from water through a semi-permeable membrane. This all work happens under high pressure. Impurities like calcium, iron, nitrates, lead, fluorides, arsenic, etc, are gets separated from the water through RO technology, and because of the presence of all these heavy metals in the water filter membrane should get changed after a regular timing. These metals are too harmful to our health if consumed regularly.


3.Quantity of water being purified: 

The quantity of water very much matters if you want to know when should you change the filter membrane of your water purifier. If you are someone who has a high requirement of water then your membrane cleaning work should be done with a smaller time interval if your water requirement is large then you should clean your membrane every 2nd or 3rd month and should change the membrane according to it and according to the water output quality of your water purifier. Better to check the water quality and taste from time to time.


4.Quality of water:

Quality of water matters the most for any water purifier as the better the water tastes the quality of the water is much higher. If there is a visible difference between your input water and output water (in taste, odor, color, and transparency of water) then it is for sure that your water purifier is working fine and don’t need any filter replacement and Changement in it, but if the case is not the same you should consider cleaning your water filter and in the worst cases, you need to change your water filter membrane.

5.Water pressure: 

Generally when the efficiency of your water purifier starts degrading will result in a decrease in the water pressure of your output water. This happens because the amount of water that should get filtered from the purifier is not meeting the expected quantity due to clogging of the waste materials in the water purifier which results in the degradation of the pressure of the water purifier. In that situation you only have a few options left, first- check if, there is only a clogging issue in your water purifier or if there is some other issue that requires the replacement of the membrane. If it is only the clogging issue then you only have to clean your filter but if your membrane has worn out because of its heavy-duty, you need o change the filter membrane.



If you don’t clean or replace the RO membrane this will badly affect the work and life span of the water purifier. Not changing the water purifier membrane will result in a bad odor of water and a bad taste. Apart from taste and odor the quality of water will also decrease and later will affect your health. Unfiltered water is similar to a slow poison, slowly the water will eventually kill you after damaging your organs. Nowadays, water contamination has become a very serious issue after all these construction works and the dumpage of water materials into the water body without treating it. Almost 80% of waste water from industries or other means gets dumped into the water reservoir without properly treating it. The government has already made rules for how to dump your water after industrial work but those things are only in books. Just imagine, drinking water from those reservoirs without proper cleaning treatment, just think where will all people end if they don’t purify the water? These are the reason why water purification is very important and as much as water purification is important, cleaning the filter membrane is important.

Manjunath Kandra

Digital Marketing Expert, consultant, Mentor and Director of KandraDigital Marketing Solutions Pvt Ltd.


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