On Sunday, 18 December 2016 14:56:07 UTC, T i m wrote:
Agreed. I setup an elderly neighbours stat-valves the other way round.
I closed all the doors then turned all the stat valves off and let
everything cool down. Then I opened each up till the rad started to
run warm according to my IR thermometer.

Then you superglued the valves to stop fiddling?

Owain