"Robert Laws" wrote in message
oups.com...

Andrew Gabriel wrote:
In article .com,
"Robert Laws" writes:


Are there any thermostatic mixers that control only the cold flow?

Specifically, for my application, is there one that would mount on the
bath as a conventioanl bath/shower mixer with a spout for the bath and
a hose connection for the shower?

You need a thermostatic mixer designed for Multipoint and Combi use.
They are more complicated than just controlling the cold, but they
know they can't adjust the output temperature by just adjusting
the hot flow. They are also very fast acting (unlike the wax pellet
bar type), but are more expensive as a result. They are also designed
for high pressure cold feed a hot feed which can rapidly change from
low to high pressure and vice versa whilst in use.

--
Andrew Gabriel


Thank you all for your helpful comments. it is clear that I need to
obtain a mixer designed to cope with this situation and not just buy
'any old thing'.

Have a look at the bar mixer available from Lidls next Thursday for £19.99

Jim A