Have you heard that more than three million people die every year around the world because of drinking contaminated water? Keep your family safe from various water-borne diseases by installing this Tata Swach water purifier at home. 4 Stage Purification This Viva Silver purifier has 4 purification stages and filters water using UV and UF technology. Voltage Spike Guard This electrical water purifier comes with voltage spike guard that protects the appliance from getting damaged. It has a longer cartridge life and a zero contaminant storage tank.