The message
from John Rumm contains these words:

Don't think it makes much difference does it? The static pressure seen
by the boiler may be less by about 0.3 bar or so. The total length of
pipe from mains to tap is much the same and the sizes of pipe also the
same.

May well be quite a few elbows though - they slow the flow down quite a bit.

--
Skipweasel
Pay no attention to that man behind the curtain.