Is the property responsible for pipeline dredging?

Public sewer pipes belong to public facilities. If it is blocked, the property is responsible for dredging it. If it is damaged, the responsible person will be responsible for the maintenance. The property law that will not be done is mainly the property law and property management regulations. The toilet supervisor of residential property belongs to public facilities, and the contract dispute between Chinese and Chinese technology contract law should be free maintenance of the property, which is included in the property fee.