Aquaguard is a brand which I like because of quality in thier products but its too bad when concerned to their sercing part. I think they don’t earn by selling purifiers, but their main source of income is by providing costly after sales service. I have heard that they dont even make parts they just buy and sell it to us, so I personally reccomend buying aquaguard products for the quality but dont pay a single buck to their service personnel, take their services till its free later find some cheap substitute.