Who is responsible for repairing the broken underground water pipe?

Legal analysis: you should go to the property to solve it.

Legal basis: Regulations of People's Republic of China (PRC) Municipality on Property Management.

Forty-fifth property management area, water supply, power supply, gas supply, heating, communications, cable television and other units should charge the relevant fees to the end users.

Where a realty service enterprise accepts the entrustment to collect the fees mentioned in the preceding paragraph, it shall not collect additional fees such as handling fees from the owners.

Forty-sixth property management areas in violation of public security, environmental protection, property decoration and use of laws and regulations. The realty service enterprise shall stop it and report to the relevant administrative departments in a timely manner.

After receiving the report from the realty service enterprise, the relevant administrative department shall stop the illegal act or deal with it according to law.

Forty-seventh property service enterprises should assist in the safety work within the property management area. When a safety accident occurs, the realty service enterprise shall, while taking emergency measures, report to the relevant administrative departments in time to assist in the rescue work.

The realty service enterprise shall abide by the relevant provisions of the state when hiring security personnel. Security personnel shall perform their duties when maintaining public order in the property management area, and shall not infringe upon the legitimate rights and interests of citizens.