Checking advice given re burst galvanised pipe

[Gasmk1]

I too did a quick google and I know its different regs in different states but one of the water companies says if galvanised outdoor or indoor if leaks and corroded replace with copper of plastic

 

[oz-plumber]

It must be an awfully old plumbing system to have galvanized pipe still operational.
Trying to repair the existing line, with cutting threads into it, to replace a section is a monumental task.
( I have some pipe threading tools - somewhere )

It would be worth getting the mains replaced, but as for the hot water service replacement, if it ain't broke - don't fix it.

You could either use copper or poly pipe, it will end up costing roughly the same.

As for Regs, I don't think there are any regulations about not using galvanized pipe - but no one would.

Your hot water service, is it mains fed or a gravity system?
That may be the reason he wanted to upgrade the hot water service