"Andrew Gabriel" wrote in message
...
In article ews.net,
"Doctor Drivel" writes:
Sounds good. Have the shower hot back to the combi and cold top the
shower
taken off the combi just before the cold inlet. Have a shower mixer with
pressure equalisation valve inside. Or fit one at the combi on the two
shower lines.

Use a thermostatic shower designed for combi and multipoints,
i.e. high pressure cold and widely varying pressure hot and
very fast reaction to temp changes. They work extremely well.

You will find these integrated equalisation valves.

Pressure equalisation valves on a combi where the hot water
pressure changes significantly as the load changes don't work
at all well with a shower (unless perhaps you are the only
person in the house). You need a fast acting thermostatic
valve anyway, so just get the right type in the first place.

You need primarily a valve with a pressure equalisation valve inside. The
thermostatic part is very secondary.