Tim S wrote:

It is a TRV. Replacing it might not require draining the system. Most makes
of TRV have replacable heads, which simply screw on to the valve body. If
you can find the make, and the heads are still available, you're laughing.


Ooh - good point - I'd forgotton that option!

And also - many TRVs come with a plain plastic cap that you can replace
the TRV with. If you can find one (plumbers merchant may be able to do
you one if you have none knocking about) yo can take the TRV head off
and replace with the cap and then use that like a manual valve - the
more you screw it down the cooler the radiator will get - screw it tight
down and the rediator is turned off altogether.

--
Cheers,

John.

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