All you need to know about a UV water purifier


Contamination of water by microbes not visible to the naked eye is the most serious contamination as they are invisible and insidious. Bacteria, viruses, protozoa, and other pathogens breed everywhere and it is a no-brainer to install a water purifier that harbors UV technology at least.

Ultraviolet germicidal irradiation (UVGI) is a disinfection method that uses short-wavelength ultraviolet (ultraviolet C or UV-C) light to kill or inactivate microorganisms by destroying nucleic acids and disrupting their DNA, leaving them unable to perform vital cellular functions. UVGI is used in a variety of applications, such as food, air, and water purification.

The application of UVGI to disinfection has been an accepted practice since the mid-20th century. It has been used primarily in medical sanitation and sterile work facilities. Increasingly, it has been employed to sterilize drinking and wastewater since the holding facilities are enclosed and can be circulated to ensure a higher exposure to the UV.

At a 254 nm wavelength, UV rays penetrate harmful pathogens in your home’s water and destroy illness-causing microorganisms by attacking their genetic core (DNA). This results in the deactivation of their ability to reproduce further as well. 

Earlier, chlorination or other chemical treatment was necessary to treat batches of water to kill microbes. It often resulted in toxic byproducts percolating into home water systems making the water taste like medicine. Fortunately, with the evolution of UV water purifiers, we no longer need to rely on these chemical treatments. Moreover, we can be sure that 99.99% of the microbes in the water subject to treatment are killed.

You might be thinking that a UV purifier is not energy efficient because of how it sounds. However, all it requires is the energy of a basic 60-watt bulb. All you need to do is replace the UV lamp from time to time. 

UV treatment is completely safe and you need not be alarmed at the word UV radiation because it treats the water inside a chamber. So, the light would not be visible to you. 

UV purifier is not a membrane-based purifier that filters out loose particles in the water. So, it is best used in conjunction with other water purifiers like RO water purifiers which eliminate the particulate matter in the water as well to produce a clean and pure jet of water.

If you happen to live in an area with frequent power outages, we recommend that you get yourself the UV water purifier of the largest capacity so that the water purified will last you a while. 

UV systems are most effective when water is clear, so they must have at least a five-micron pre-filter to prevent living organisms from hiding behind loose particles. So watch out for the turbidity of your water. UV light’s disinfection effectiveness decreases as turbidity increases, a result of the absorption, scattering, and shadowing caused by the suspended solids.

A Pureit UV Water Purifier price range can start from Rs 7000 and can go up to Rs 9000. At Rs 9000, you will get purifiers that have double water purification capacity, double cartridge life of up to 6000 L, double purity lock, advanced voltage fluctuation guard, and low maintenance cost. When you opt to buy UV Water Purifier Online, make sure that your chosen product fulfills all you and your family’s needs.

The Pureit UV water purifier has the following features:

  1. The Pureit filter has a long life of 6000 litres when compared to the 3000 litre life of ordinary filters.
  1. Lower maintenance cost that works out to just 25 paise per litre!
  1. 4 litre storage tank that is ready to supply you output even in the absence of electricity.
  1. Double purity lock with an advanced alert system that warns you 15 days before the purifier starts working.
  1. The advanced fluctuation guard protects your purifier from voltage fluctuations between 110 and 270 volts.
  1. Fully automatic tank filling where the purifier senses that a tank is not full and fills it automatically.
  1. The UV lamp is designed to last typically for 10,000 working hours.

Purification technology used by a typical Pureit UV water purifier:

The Pureit Marvella UV G2 has a 4-stage purification system that ensures you get water that is ‘As safe as boiled water’ that meets the stringent standards set by the USEPA for Microbiologically safe drinking water. First, the water passes through the Sediment Filter which removes fine and coarse particulate impurities/dirt. The second stage is the Activated Carbon Filter that removes remaining dirt, chlorine, and organic impurities like harmful pesticides. It also absorbs color and odor-causing organic compounds from water. Then the water passes through Mesh Filter, which ensures that no suspended / dirt particles enter the UV chamber. High-intensity UV rays ensure maximum UV intensity for the inactivation of bacteria, viruses, and parasites to deliver safe water always.

If your TDS level is below 500 ppm and the turbidity of water is minimal, you can run the show just by getting yourself a UV water purifier. Yes, RO is needed only if your TDS exceeds 500 ppm. But if you are looking for ultra-pure and ultra-clean water an RO + UV is not a bad idea.