Is the main water pipe in the kitchen broken and the property undertakes the maintenance or the owner undertakes the maintenance uniformly?

Property (or developer's construction unit) should be responsible for maintenance.

The main sewer pipe of the kitchen belongs to the public facilities of the residential building, even in the owner's home, but it does not belong to the owner privately, but belongs to all the owners of the building.

In case of damage during the quality warranty period of housing construction project (the warranty period of water supply and drainage installation project is two years), in accordance with the provisions of Decree No.80 of the Ministry of Construction, the property can be notified to contact the developer to instruct the construction unit to carry out maintenance; Beyond the warranty period, in accordance with the national "residential special maintenance fund management measures", the property shall apply for the use of public maintenance funds for maintenance.