Priced: estimated price for a set of filters - 3000. (According to the instructions, it is necessary to change every six months). Decide for yourself whether it's expensive or not. Different pros: It filters water perfectly (for 4 months of use, there is not even a hint of scale in the kettle). This is despite the fact that the water in Hong Kong is very muddy and hard. To taste - after the filter, the water is not inferior to the purchased one. I bought in January 2022 for 9000-10000. I installed it myself according to the scheme - it took about two hours. (there is already a tee 1/2 -1/2 - pipe clamp). The only thing required for installation is an adjustable wrench and a 7 mm drill and a drill / screwdriver to drill a return hole in the drain. Some cons: There was not one fitting retainer in the kit - such a plastic bracket (the problem is solved by replacing this retainer with an ordinary paper clip). At the first launch, it loudly bleeds air from the system (this is more a feature of reverse osmosis than a disadvantage). After a couple of days, the sound disappears - consider this feature.
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