My towel radiator valve is leaking. From the outside it looks like this
Looks to me as though the brass valve body is faulty and that I should be able to replace it with a new one. How standard is this part? I don't want to have to take it out before I go round shopping for a replacement, so what are my chances of being able to pick out a suitable part armed with the photo?
I'm kind of hoping that if I find a suitable part, I can put a bucket under the tap, and swap them quickly without bothering to drain the system. Is this realistic?
Thanks in advance for any help!