In message , at
11:52:43 on Sun, 3 May 2020, Kellerman
remarked:

hen my nest door neighbour built his new house he found that the water
pipe in the street was a combination of lead piping and asbestos pipe.
He wasn't allowed to connect up to the water until the street pipe was
replaced with plastic. They used a mole system to do it.

If you are doing lots of properties (all needing connecting to a new
street pipe, whether that's water or gas) then a deploying a mole for
the day is cost effective.

For a one-off, I suspect not so much.
--
Roland Perry