wrote:

So why bother faffing around with it then at all ?, Copper, all the way
unless there's somewhere awkward to thread it through.

It has its attractions... Easy to thread, easy to bury, and quick to
cut, form and assemble. If you use copper or chrome for the visible bits
then saggy bits do not matter much so long as you are not stressing
joints. The issue of air locks on CH systems is not that significant
with pressurised systems anyway.


--
Cheers,

John.

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