LG’s advanced multi-stage reverse osmosis (RO) system delivers safe drinking water via a multi-stage filtration method that removes contaminants as minute as 0.0001 micrometers in size.RO filtration eradicates bacteria, viruses and heavy metals to provide incredibly pure drinking water.LG True Water Purifier is equipped with Mineral Filter which adds on minerals in 100% RO Purifier Water and makes water Healthier and Tastier.The LG water purifier’s Dual Protection Stainless Steel Water Tank™, maintain freshness of water and reduce the growth of bacteria and algae. Far more hygienic than a conventional plastic tank, it ensures that water remains safe for drinking with Dual Protection Seal.LG's Stainless Steel water storage tanks have 94.4% less E.Coli growth in 24hrs as compared to plastic tanks. Thus, stainless steel storage tank in LG True water purifier is safer than regular plastic tank in other water purifier.RO removes virus and bacteria; so there is no need of UV in the filtration stage. UV Cycle in LG True Water Purifiers runs during the Preservation stage. While the filtered water stored in Dual Protection Stainless Steel Tank™ is absolutely safe and clean to drink, The UV Cycle that automatically starts every 6 Hours.