In hotel industry nothing is coincidence, and there should always be a backup plan. We are talking about very serious business here, and nothing should be left to destiny. Every hotel should have a house tank, two pumps. If the hotel is more than twenty floors high, the tank should be on every tenth floor. No matter what happens, there should be enough water for guests. Hotel maintenance is certainly one of the most demanding part of the plumbing work. Only the best organized can take over that kind of work. The complexity of work depends on capacity of a hotel and the complexity of its service. Anyway, not every plumbing company can be a part of this industry. You need to have a lot of experience to enter it and take such a big responsibility.