What should I do if the water pipe leaks upstairs?

Make sure that the water pipe upstairs causes water leakage, and the maintenance cost shall be borne by the upstairs owner. First, through property coordination, if not, take the road of legal proceedings and sue the upstairs owners.

The legal basis is Article 83 of the General Principles of Civil Law: If it causes obstruction or loss to the other party, it shall stop the infringement, remove the obstruction and compensate for the loss. If the neighboring party fails to perform the court's judgment, the injured party may ask the construction team to repair it downstairs, and the expenses incurred may be claimed by the upstairs owner to the court.

Therefore, if the water leakage is not caused by the people downstairs, it is the responsibility of the upstairs, and the upstairs has the responsibility to repair it until the downstairs no longer leaks, and compensate the corresponding losses downstairs.