Speaking about the quality of imported or domestic goods, we can not say with certainty that the imported goods are good, and domestic plumbing is bad.
Visiting the sanitary engineering shop, you probably will not always be able to determine which of them are imported, and which are domestic. Sometimes only a professional can distinguish them.
A few tips to choose a bathroom plumbing.
In all price categories there are their own well-known manufacturers. Quality of their products always meets the universal concepts and standards. In this case, once you determine how many are willing to allocate funds for the purchase of a product.
For example, foreign-made earthenware products can replace domestic ones. Suntec factory, which is in Europe, manufactures all products to the equipment from Germany. They are ready to give their products a 10-year warranty. The factory quality requirements are very high, and at times exceed the requirements of Samara or the Kirov factory. On the white enamel, you will not find any nodules or blotches. Components are accepted, Czech and German manufacturers. In addition, virtually every major store in your city Plumbing certainly sells products from this plant, because it enjoys good demand (as already mentioned, not every consumer in the teeth to determine the origin of goods).
Another striking example is the plant Keramin, which is located in Belarus. They offer a wide range of quality products to the full assembly.