Does the drainage pipe belong to property management?

"Regulations on Property Management" Article 2 Property management as mentioned in these Regulations refers to the activities that the owners select property service enterprises, and the owners and the property service enterprises maintain, conserve and manage the houses, supporting facilities and related sites in accordance with the property service contract, so as to maintain the environmental sanitation and related order in the property management area. Article 35 A realty service enterprise shall provide corresponding services in accordance with the stipulations of the realty service contract. The realty service enterprise fails to perform the realty service contract, causing personal and property safety damage to the owner, and shall bear corresponding legal responsibilities according to law.