10 house, the kitchen hot water pipe reserved by the developer leaked downstairs. Is it the responsibility of the owner or the property?

In this case, if you bought the house yourself, you should repair it yourself. However, if the house is rented to you by a property management company, then the property management company should bear the responsibility for maintenance.

According to Article 51 of the Property Management Regulations, "the property management unit shall be responsible for repairing and maintaining the house and its ancillary facilities to ensure its safe and normal use." Therefore, if the house you live in is rented by a property management company, then the maintenance responsibility of this pipeline should be borne by the property management company.

However, if you or your family's behavior causes the pipeline to leak, then you should bear the responsibility of repairing it. So I suggest you apply to the property management company for maintenance, and ask the property management company to solve this problem.