Is the residential property responsible for the damage of the backwater upstairs caused by the blockage of the bathroom pipeline downstairs?

Residential drainage pipes belong to the public part of the property. As a residential property service enterprise, the property management company stipulates the scope of property services according to Article 11 of the Measures for the Administration of Property Service Charges, in which Article 8 stipulates: the parts used by the property, the facilities and equipment used by the property and the public liability insurance fees; Public drainage pipes belong to the * * * part of the property, and * * * facilities belong to the scope of property maintenance management, so the property management company should carry out maintenance management on them.

If the owner downstairs blocks the pipeline privately, then he is directly responsible. Moreover, the bathroom pipeline belongs to the private part of the owner, and the property company can't investigate and control Mr. Gao's behavior of blocking the pipeline. If the owner downstairs does not inform the property, the residential property is not responsible.