After handing over the house, the property left the key and the sewer pipe was changed upstairs. Is the property responsible?

According to relevant information of official website, there is no joint liability. Because the owner is the employer of the property management company, the property management company has no right to interfere in the family affairs of the employer. If the drainage of the upstairs residents is affected, the victim may request to remove the obstruction, restore the original state and compensate for the losses. Please negotiate and handle it properly. If consultation fails, the residents' committee may mediate. For specific information, please pay attention to official website for first-hand authoritative information.