In an earlier contribution to this discussion,
Richard Conway wrote:

Martin Pentreath wrote:
Also bear in mind that now that you have the rad off the risk of the
TRV peeing forth water is unrelated to whether you use the heating or
not, which was the original question. In fact using the heating is
more likely to keep the temperature of the room above the point
where the TRV will start to open.


You could always try and find some end caps that will fit the thread
on the tail adding extra protection. Does anyone know what thread
they are? Could be worth getting a couple in for that very reason.

There are at least 2 different ways for joining radiator tails to valves -
and the threads are different. The larger ones - employing a conical joint -
have a 3/4" BSP thread. The smaller ones - employing a conventional 15mm
compression joint with olive, have the same thread as a 15mm compression
joint - which is similar to 1/2" BSP, but not quite the same.
--
Cheers,
Roger
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