Is it reasonable for the water supply company to ask for paid maintenance (no money, no water supply) because the main water supply pipeline of the residential building (Unit 6) is leaking?

I'm from the water company, and I can answer your questions. First, you can go to the local tap water management department, such as the Water Affairs Bureau, the Construction Bureau, or the professional supervision telephone to complain about the water supply company's water cut. Because according to the urban water supply regulations, water supply companies must obtain the consent of government departments at or above the county level. Now, for the sake of harmonious society, it is impossible for the government to agree to stop water supply. So it must be the private behavior of the water company. Second, according to the Water Law and the Regulations on Urban Water Supply, water supply companies should meter water charges per household. Now the water supply company should also bear part of the responsibility for the failure caused by historical reasons. Therefore, it is more reasonable to install the household water meter first and then push back the water fee. Third, when water leaks, the water supply company also has the responsibility of pipeline maintenance, including compulsory replacement and calibration of the main water meter within five years. So the water fee should be negotiated.

In addition, according to the urban water supply regulations, the water meter damage should indeed be borne by the water company. Unless the user intentionally damages it.