"John" wrote in message
...

"Roger" wrote in message
k...
The message
from "Doctor Evil" contains these words:

2 * 2-port valves etc, but you'll also need a bypass (e.g. pressure
relief bypass) so when the last valve turns off and tells the boiler
to
stop theres somewhere for water to go while the boiler keeps the pump
running as it cools down

That is only if there are thermo rad valves on all rads. If the rads do
not have
rad valves there is no need for it, unless the maker states one for
heat
dissipation reasons.

Am I being particularly dim this morning

You are dim.

No Roger its not you g.

He is dim, he said so.

Apart from your comment its usual to have "rad
valves on all rads" in this reality

Nothing says you need to have thermo rad valves on a two zone system.



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