I have always found that water pipes sound different if tapped to gas pipes.
Brian

--

This newsgroup posting comes to you directly from...
The Sofa of Brian Gaff...

Blind user, so no pictures please
Note this Signature is meaningless.!
Harry Bloomfield; "Esq." wrote in message
...
fred pretended :
Serious explosion bellied caused by cut gas pipe. How ? Presumably it was
in error but what would you be doing for that to happen?

Perhaps a bit of plumbing or heating - a copper gas pipe looks identical
to a water pipe.

Maybe a case for a regulation suggesting gas pipes out to be clearly
identified, as they often are on commercial premises?