A water purifier has become a necessity in every home due to rising pollution levels and the poor quality of water in various cities. Although there are multiple water purifier models in the market with various features, what matters the most is the quality of filters. Filters and the RO membrane inside a water purifier remove dissolved and suspended impurities from drinking water but they get clogged after a few months of usage, turning less effective. Hence, it is important to regularly service the water purifier and replace the filters periodically to ensure you and your family consume clean drinking water.

Sometimes you may not remember exactly when you purchased your water purifier and when you should get its filters replaced with newer ones. In this article, we will tell you about a few early signs that could indicate that it’s probably time to change your water purifier’s filters and the RO membrane.

Water Purifier Filters & Membrane

1. Water is Dispensing Slowly & With Lower Pressure

The filters inside a water purifier get choked with the impurities present in the water, especially in the case of water with high TDS levels. In such a situation, you may notice that the water pressure is lower than earlier and that water gets dispensed slowly. It means that you might soon need to replace the filters to get your water purifier back up and running.

2. Change in Water’s Taste & Odour

When water passes through various filters and the RO membrane, certain harmful chemicals and unwanted particles are filtered out. When the filters get choked, they don’t work as efficiently as required, and the impurities might get passed on to your drinking water. This may lead to an unusual taste and odour in water, especially if the carbon filters are not working properly. Hence, you may need to soon replace the filters.

3. Higher TDS Levels in Water

TDS (Total Dissolved Solids) is an indicator of water purity. Impure water has high TDS levels. When the filters start wearing out, you might feel that water tastes a bit salty and feels hard. Another sign of high TDS levels in water is that it can leave white stains on the drinking glass.

You can check the TDS levels of your drinking water using a TDS meter, which is easily available online or in hardware stores. Whenever you replace your water purifier’s filters and RO membrane, check the TDS of the water, and note it down somewhere safe for reference. A dramatic increase in the TDS levels indicates that either the input water quality has gone bad or it is time to change the filters and membrane.

4. Water Appears Cloudy

Clean water appears colourless and transparent. If water lacks this quality, it means that there are impurities in it. When filters don’t work as they’re supposed to, it could sometimes result in a cloudy appearance, and such water is not considered safe for drinking. Turbidity refers to the cloudiness of the water, and you can check for it by holding a glass filled with water against the sunlight. If the water appears cloudy, it is a clear sign that you need to get your water purifier’s filters and RO membrane replaced.

5. Alarm or Indicator Light On Your Water Purifier Gets Activated

Since not everyone can remember when it is time to change their water purifier’s filters, many brands equip their purifiers with an alarm or indicator. These things get activated whenever it’s time to change the filters and the RO membrane. If your water purifier shows any such signal, please get it serviced at the earliest.


Any of the signs mentioned above indicate the need for immediate servicing of the water purifier, and in most cases, they need the replacement of filters and RO membrane.

RO Water Purifier Cartridges With Water Glass

We recommend using Onsitego’s Water Purifier Repair services to replace its filters and the RO membrane. Click on the ‘Book Service‘ button below and use the code ‘QUICKREPAIR‘ to get a flat 15% discount on water purifier repair services.

Water Purifier Filters & Membrane

Why You Should Consider Buying a Water Purifier Annual Maintenance Plan (AMC) by Onsitego?

Some water purifier AMC (Annual Maintenance Contract) brands send service engineers to your place periodically without a need for you to contact them, especially when you’ve subscribed to AMC plans. Onsitego’s AMC plan for RO+UV and UV water purifiers includes two scheduled maintenance services a year, annual replacement of filters and membrane, and unlimited repairs. You can watch the video listed below to know how Onsitego’s service professionals service a water purifier at your home.