There is no such thing as a 'maintenance free water purifier in India'. Maintenance cost of water purifiers should be an essential consideration when buying water purifiers. Water purifiers need replacement of filters and cartridge around 6-8 months depending on your usage. Replacing these cartridges make the water purifier perform efficiently in purifying the water. If you take the AMC i.e. the Annual Maintenance Contract, it will cost as less at about Rs.1000/- per year with the cost of parts extra or approximately Rs.6000- per year with all parts included. With an AMC up to 3 free visits for preventive maintenance plus free breakdown on-call service is covered per year.