How to identify the responsibility for the leakage of the sewer pipe located upstairs in my house?

Responsibility identification of water leakage in the sewer pipe upstairs of my house;

1. Find out the cause of water leakage in the sewer pipe and see if it is caused by the fault of the upstairs residents. If it is caused by the upstairs residents, it shall coordinate with the upstairs owners to compensate for the losses;

2. Whether the leakage of the sewer pipe is caused by the property's failure to perform its duties, if it is due to the negligence of the property, you can ask the upstairs owners for compensation for the losses caused by the property within their main responsibility scope;

3. For other reasons, it may be that the installation of the sewer pipe is faulty or there are quality problems, and the relevant personnel may be required to compensate for the losses respectively.