The dung pipe upstairs is leaking. Should I find a property or an upstairs owner?

Judgment of maintenance responsibility: 1. The public drainage riser is maintained by the property company. 2. The special drainage branch pipe is maintained by the user.

If the property repairs the drainage pipes dedicated to the family, it will be charged.

In view of the above principles, you should find both the upstairs and the property and let them negotiate to solve this problem.