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When should you change the filters of your water purifier?

By Pureit Water | June 25, 2021
Water Purifier

Regular maintenance of a water purifier is important to ensure efficient functioning of its filters and other parts. Periodic checks and cleaning of filters also ensure consistent supply of pure, clean, and safe drinking. But how do you determine when exactly you should get your water filters replaced or call for a service?

We have prepared a handy list of early indicators that you should watch out for in your water purifier. These signs/factors can be considered as clear indicators of filter replacement or service requirement.

1. Longer wait time to get purified water

A water purifier is functioning properly if the purified water is being dispensed by it normally. The volume should be just fine – as it was when you first started using it. However, if you notice a reduction in the speed of purified water dispensing i.e. the flow rate of the water is slower than usual, there might be a chance of water clogging in the system. Water clogging is caused by the collection of excess debris on the filter or membranes of the purifier, thus restricting the flow of water.

2. Check sediment filter for brown scaling

Sediment filter as the name suggests captures sediments or suspended particles like dirt, silt, mud, clay etc. As the sediment filter is placed outside the water purifier, it can be easily opened and checked for deposits and scaling. A brown scaling on the filter indicates its overuse and needs immediate replacement. A periodic replacement of such membranes allows a longer life span of the device, and to the other filters too.

3. Output water tastes less sweet

Eventually, with the continuous passing of impure water through the membranes, these cartridges lose their absorption properties impacting their efficacy. As a result of which the total dissolved solids (TDS) may not get properly filtered and can be higher than before. This in turn affects the taste of water, making it harder and thus reducing its sweetness. Frequent cleaning and timely replacement of filters would reduce such problems, ensuring 100% safe and sweet tasting drinking water.

4. More water gets wasted as reject water

An RO water purifier discharges impure water as reject water during the process of water purification through an outlet. If you notice a surge in the volume of rejected water, ie. it is more than the usual volume; it is a sign of reduced efficiency of the water filters. Such alarms indicate replacement of the filters.

We hope the above guide will help you take an informed decision regarding the services related to your water purifier. Like any other appliance, proper maintenance improves the life of your water purifier and at the same time ensures health and safety of your family. A lot of latest water purifiers in the market, like that of Pureit, come with Advanced Filter Alerts which guide you well in advance about the upcoming need of filter replacement, technical failure, etc.


  • How often should you change the filter in your water purifier?

    Every filter has a different span of life and you should get to know about the maintenance during the purchase. Brands like Pureit offer bi-annual or annual maintenance for water purifiers. Usually, filters need a replacement between three to twelve months.

  • What happens if the water filter is not changed on a timely basis?

    Water purifiers run on the filters installed within the system. These filters need to be replaced according to maintenance requirements otherwise the purifier will not be able to function properly and you will start receiving impure water.

  • Why is it bad to drink water from an old filter?

    When the water filter gets older, it may not function effectively. As a result, you may have to drink water that contains bacteria and chemical buildup. So, your water purifier needs proper maintenance to keep you healthy.

  • When should I change my RO filter?

    RO (Reverse Osmosis) is an effective way to remove TDS of water. The RO filter needs maintenance every six to twelve months to function optimally.

  • When should I replace my carbon filter?

    Carbon water filters play an important role in the water purification process. Hence, it is crucial to replace carbon filters at regular intervals. Usually, you need to change Carbon filters between six to twelve months.

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