It is never advisable to buy a non-branded RO water purifier. Your health should be always more important. You should invest in a reputed brand because of the quality you get. Non-branded water purifiers do not have TDS controllers or mineralizers. This affects the quality of the water. These locally made water purifiers might be found in low price, but they are not worth investing. You will lose all the minerals in the water when you will buy the cheap ones