If you buy the ro water purifier
- ₹16,000 paid up front, before it has purified or heated anything
- About ₹4,500 a year in filters, servicing and replacement parts
- Every breakdown is a call you make, a part you source and a bill you pay
- Ageing every day of the year, with no cover once the warranty lapses
- Worth a fraction of the purchase price when you are done, and yours to dispose of

