In article op.wlikawzlxafqef@desktop, MarkG writes
On Mon, 01 Oct 2012 19:47:25 +0100, fred wrote:

In article op.wlif25ksxafqef@desktop, MarkG writes

You also say the mixing valve has a maximum pressure of 5bar so there
may be an issue there too but the bad news is that if you have over 5bar
on both hot and cold then you may need to pressure reduce both.

Well it states a maximum "static" pressure of 10bar and a maximumk "flow"
pressure of 5 bar.

What's the difference? - please no wise asses saying 5 bar :-)

This means that when it is off it wont leak or burst at a pressure up to
10 bar, when it is operating (on) however the pressure limit is lower,
5bar.

No idea what the reason for this is, it may be a pressure balance issue
or it may be that post valve sealing is not proof to higher levels.
--
fred
it's a ba-na-na . . . .