I want to know about the earthquake resistance of water pipes

In Water Works Bureau, when renewing old water pipes (obsolete pipes), we began using seismic pipes with some diameters in fiscal 1981, and since fiscal 2006, we have used seismic pipes with all diameters.
There is a water distribution pipe of about 9,300 km in the city, and it takes decades to renew and make everything earthquake-resistant. Therefore, in addition to the material of the pipe, the year of laying, the degree of corrosion and the strength of the ground are comprehensively considered. We prioritize and prioritize. In addition to the evacuation shelter (elementary and junior high school), which serves as a citizen's place of refuge in the event of a disaster, large hospitals such as disaster base hospitals and emergency notification medical institutions, as well as ward offices that serve as disaster response bases, have been systematically earthquake-resistant.
For more information, please visit the official website.

Renewal of water distribution pipes and efforts to improve earthquake resistance