Thanks Chris, I'll give that a go first.
No, changing it isn't the problem, I can do that without instructions, it's just that I'd thought I'd better check on the net first if there was a problem with removing radiator connections with sealed systems. So far anything that involves...
I have a sealed CH system and one of my downstairs rads has a leaky valve after I turned it (now wishing I hadn't).
Fully open it will release about 2 tablespoons of water in about 8 hours, but closed or partially closed it will release a lot more than this.
I wish to replace it, a task I...