After many search in Internet and finally I bought Aquapot RO+UV Smart water Purifier. This is an excellent product and works without any hassle. The output water is crystal clear and taste good. I am using this with the Metro water as of now.
I would recommend this for those who are going for new water purifier and they have office in Chennai and the team is good. Customer support is another plus and they call regularly to find out if there are any issues. Great product from Aquapot.