Top 6 Frequently Asked Questions About UV Purifiers Answered

Ensuring the good health of our family members is always a top priority in our list. To keep them healthy and free from ailments caused by food and water, we use water purifiers at home. Although our municipal authorities implement multiple processes to supply clean and safe water to our houses, who knows how it might get contaminated. Since such accidents are common, we take an extra step and install UV water purifiers to sanitise our drinking water. Here we will take a look at the top 6 FAQs related to UV purifiers.

  1. Why are UV filters preferred over ordinary filters?

This question is commonly asked by many people. The answer is, ordinary filters are not effective in killing bacteria, and thereby the water remains impure. UV filters, on the other hand, are strong enough to kill bacteria and germs, resulting in healthy and pure drinking water.

  1. What is the UV technology used in water purifiers?

UV technology makes use of ultraviolet (UV) light waves of a certain frequency which have germicidal properties. Water purifiers that employ this technology use specialised lamps which emit UV rays. The frequency of UV light used in water purifiers is generally in the range of 254 nm which is known as the Germicidal Spectrum or Frequency. When normal tap water passes through a UV treatment plant, it effectively kills microorganisms present in it rendering the water free of germs.

  1. Is the UV lamp directly exposed to drinking water?

The UV lamp that is used in water purifiers is never exposed to water; it comes in an outer enclosure and lies at the centre of the water filter. This outer enclosure remains exposed to water so that the emitted UV light waves can infiltrate the water directly and disinfect it successfully. Well, known brands of UV water purifiers use a 11W lamp that is powerful enough to purify normal tap water.

  1. What happens if the UV lamp does not work?

Modern water purifiers employing UV technology are smartly programmed with UV failure alarms. Whenever the UV lamp inside the water purifier goes out of order, the disinfecting functionality ceases to work. In that case, the supply of power to the water purifier cuts off immediately which in turn stops its operation. This is done, so that unclean tap water is not supplied by any chance.

  1. Does water quality influence UV action?

Water quality plays an important part in determining the effectiveness of UV purifiers. To get the best results from UV water purifiers, the incoming water must not contain particles greater than 5 microns. This is because larger particles can block the UV light from killing germs. The water thus flowing out is consequently not pure.

Also, most UV filters do not remove dissolved impurities and are therefore it is more effective on water with a low level of Total Dissolved Solids (TDS). If iron content of water supplied by your municipality is low, then it should be fine for your UV purifier.

  1. Why is activated carbon used?

Activated carbon acts as another level of purifier by removing toxic chemical substances such as pesticides and heavy metal compounds which might remain dissolved in water. Getting rid of germs as well as toxins makes the tap water totally safe for drinking. Activated carbon is also used in UV water filters to remove any unwanted smell or taste from the disinfected water.


Even though we hear about UV filters and how useful they are, not many of us know why exactly these are important or how they function to keep us healthy. So, with these answers, you will surely have a better understanding of why a UV water purifier is a must-have appliance in your household for a healthy life.

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