The bleed valve on one of my radiators has become rounded off and now I can't turn it with the radiator key to bleed. I've tried pliers but can't get enough leverage. Any ideas? Will I have to replace the whole radiator?
if the rad dont have a brass/chrome fitting in it. just a welded in nipple. its not good. i have in the past drilled them out tapped a thread & used a pan head screw with a washer but is tricky & dont always work. If ya gona have to swap rad its not a risk to try with the rad isolated . u need an engieering merchants to bye a drill bit a thread tap & matching screw.
Thanks for the advice Bab, yes its just a nipple, no chrome/brass surround. Just wanted the check that there was no easy solution that I had overlooked, thought there might have been some purpose built tool.
I had one like that last week, slackened off the rad connections & laid the rad down on the floor. soon bled it through the connections, mind you I was refilling the system so the rad was near as dammit full of air.
Just try several (different makes and types) raditor keys - one of them will grip just enough to get it out.
Once you've got it loose, you could take the whole screw out and get a replacement - possibly from an old rad at the dump !! Could also cut a slot in the grub screw as a temporary measure. i think there's only 2 or 3 sizes of threads used.