How to compensate the waterproof property on the second floor?

Legal analysis: if this sub-situation is caused by the blockage of your own sewer pipe and the loss of the downstairs after the anti-water, then you should bear this responsibility; If the sewer pipe is blocked from the first floor, but you don't know that the loss downstairs is caused by the water pouring from your sewer pipe, then this loss should be solved by you, the first floor and the property (there is a favorable condition for you, how can you prove that the sewage overflowing from your sewer pipe crossing is discharged by you? If you can't prove it, then you are not responsible. The first floor can investigate all tenants from you to the upstairs, but you can't just investigate yourself. If the property has known about the pipeline blockage before and has not solved it, then the responsibility will be borne by the property. On the other hand, if you live on the second floor and your sewer pipe is independent of the first floor, even if the blockage is not caused by you on purpose, the responsibility will still be borne by you, regardless of whether you have communicated with the property in advance about maintenance.

Legal basis: Article 238 of the Civil Law of People's Republic of China (PRC) infringes on property rights and causes damage to the obligee, who may claim damages or bear other civil liabilities according to law.