On 18 Dec 2004 12:10:06 -0800, "jdi" wrote:

Can anybody tell me whether a thermostatic shower valve will be of any
benefit in a system fed by a pump with twin impellers.

Yes it will.



My, maybe nieve, understanding is that the pump will balance the flows
and prevent any temperature fluctuations due to surges etc in either
the hot or cold supply.

Not really, the valve will balance in order to maintain the required
temperature.


I do not want to pay the extra for a thermostatic valve if a simple
manual valve would suffice.

You can use a manual valve, but the water temperature will tend to
drift - especially if the water in the cold tank has been standing for
a while and has warmed slightly. When cold from the mains comes in
to replace it, the mixed water temperature will fall with a manual
valve.




--

..andy

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