Daly City burst water line.

Cast Iron Pipe
  I was surprised to hear that the water pipe in Daly City that burst and caused so much damage was made of cast iron. How foolish. Cast iron pipe should never be used in a high pressure/high stress situation.
  How do I know this? For many years I worked in the elevator trade, and many of the elevators were oil hydraulic. The code is very specific concerning this. NO cast iron pipe. Only steel pipe of a high specification is permitted. This code should be the same for all high pressure water lines. If this had been the case in the Daly City water line, there would have been no disaster.
  So, all you folks that write specifications and award contracts, cheap is not the way to go. It will come back to bite you.