After various levels of purification that involves RO+UV+UF+COPPER+TDS Control+ UV disinfection, the Krishna Electricals Aqua Fresh water purifier gives you tasty and healthy drinking water. Aqua Fresh India Swift Series RO Water Purifier with UV, UF,ALKLAINE,COPPER and TDS Controller | 16 Liter | 6 in 1 Best For Home Office.