This RO of AO Smith is worst water purifier ever. On top of that the service is pethetic. Water filter needs replacement every 3 months on normal usage. Service guy comes after a delay of 7 to 8 days because he doesn’t have a basic replacement for water filters. Filters cost between 2k to 4k. are expensive. Hardware is bad, things get spoiled easily. AMC is close to 4k. Worst product.