IMM wrote:

Then use copper and brass push-fit joints. Using straight rigid lengths of
Speedfit is not different to using copper. Copper is far cheaper and you
can use brass push-fit or plastic fittings.

When doing a straight 3m run, yes, copper. But the straight
lengths of pushfit can still be snaked around (more easily than
the coils in fact), so they still save on elbows.

--
Grunff