The first floor of the new house was renovated, and the water pipes and main pipes were distributed upstairs, and the property was restored. The downstairs disagreed. What department should I call?

Since the communication between the property and the owner fails, you can sue.

Both the lessee and the owner of the house have the right to be the plaintiff. If the adjacent property causes losses, the owner can claim compensation for the decoration losses as the plaintiff, and the lessee can also claim compensation for the property losses as the plaintiff.

Article 71 of People's Republic of China (PRC) Property Law stipulates that the owner shall exercise the ownership of the exclusive part. Owners have the right to possess, use, profit from and dispose of the exclusive parts of their buildings. The owner's exercise of rights shall not endanger the safety of the building or damage the legitimate rights and interests of other owners. Article 92 of the Property Law of People's Republic of China (PRC) stipulates that damage shall be avoided when using adjacent real estate. The property owner uses the adjacent property for water use, drainage, traffic, pipeline laying, etc. We should try our best to avoid causing damage to neighboring real estate owners; If damage is caused, compensation shall be made.