My house hasn't been decorated yet, and there is a leaky property in the trap of the toilet sewage pipe downstairs, which is said to be the responsibility of the upstairs owner. I can't figure it out.

First of all, let me tell you why the property is said to be the responsibility of the upstairs (that is, you). The sewer pipe above the downstairs bathroom is the sewer pipe of your bathroom, and you will be responsible for it if you use it. Similarly, the sewage pipe above your bathroom belongs to your upstairs owner. If something goes wrong, the upstairs owner is responsible.

Put yourself in others' shoes. Don't worry if the sewage pipe above your bathroom drips! So fix it quickly!

Repairing a leaking lid is easy, but there are only two situations. The cover is not tightened or tightened too tightly to break it. Just tighten, or tighten another one.