We shifted from native place and I received a call from my wife in office.She said I have arranged water purifier demo so come soon.More than 15 days we were buying 20ltrs water bottle.The demo was good, my wife and I decided to buy Zero B water purifier Eco RO, in the beginning I did not understand what is RO.In native land nothing of such.Finally got Zero B Eco RO installed and since 7 months we have had no big issues.Initially I called up customer care few times and they did revert with a solution.