I don't mean to be rude and of course shoot myself in the foot but isn't the point of me taking all this time to open an account here, make a fun avatar, start a long thread that took me a few hours to put together, be, so that someone with knowledge in return, imparts some to me lol??
How would you do it without draining the system, is it by freezing the pipes?
And what are you referring to in the last paragraph. The Conet rad valves. Are you telling me to not use them and are they the valves for the radiator?
I would of course be in a better position to pay a plumber but have had a bad run with tradesmen and am currently refusing to have anymore in. The last one flooded my house and now I don't have the money anyway to pay anyone.
Unless you live in pompey and or are happy to do it out of good will, the next best option is to help me here
but I understand your knowledge has been earned and shouldn't be given away free which then asks, what is the point in this forum for DIY enthusiasts?
Anyway I appreciate your response and thanks for taking the time to respond. You didn't have to.
The old valves are Conet and probably not made any more. You really just need decent replacement thermostatic valves on most of the radiators and also replace the other side. You can get TRV with a lockshield packs of rad valves.
I do not freeze pipes, but do it a different method, but you will be best to just drain the lot, as Last Plumber said. I don't want to have you getting into bother and causing water damage.
I would have had all your valves replaced quicker than you typed your post no doubt, but I have been doing that sort of work regularly.
It is a shame you haven't found a plumber you have confidence with. It doesn't surprise me, but there will be some good plumbers out there if you keep trying.