At this point, in my area it's required by law to have a hydrofoor when your building is 13 meters tall (or taller). No water tower allowed, and skipping the entire thing isn't allowed either. In the USA that would probably be regarded as 'nanny state', but this is a typical case where you cannot trust a company or installer or building owner to do this right by default, hurting basically everyone else. I'm not sure what hydrofoor translates to, but it's basically a pressuriser, pump, buffer tank in one, that you have in the technical room of your building, that is inspected by the water company which is inspected by the 'watershap' (not sure what that translates to), which is inspected by the government. It takes a whole lot of people doing it wrong on purpose before that chain fails and you get bad water.