On 24 Sep, 14:11, "dennis@home" wrote:
"Tim S" wrote in message

...

What is an interesting question is what happens if the plumber just
replaced
a load of metal pipe with plastic. That's a bit more of a can of worms.

Or if they are silly enough to put PTFE tape on compression joints?

I hadn't considered that this could cause a loss of electrical
continuity on pipe-work!
So do you mean that PTFE tape should not be used at all on compression
joints?

I would have thought that there was still enough metal-to-metal
contact in a compression joint to maitain continuity?

Mark.