Is it a responsibility to run water upstairs?

Water supply has nothing to do with property. If the property finds that there is water running or should know that there is water running and fails to take timely treatment measures, the property should bear certain responsibilities. If there is no faucet upstairs, the property company will take emergency measures to control the loss, and they are not responsible for this problem. This is a problem between you and upstairs. This is a dispute between two civil subjects. Property can only be coordinated, he can't be a referee. If there is no coordination, there will be no responsibility. I think you should go directly to the development company, and only recognize that the house is his and he is the owner, and his house has caused you losses in the process of use. You should seek compensation from the owner. As for his relationship with the tenant, you don't care, just don't know.