Advice Please -Radiator valve stuck/whole body comes loose when trying to open -10mm??

[bilabonic]

Basically you need to get the nut on and press down as you tighten, hopefully it will catch the threads and as the nut tightens it'll push that packer back down. Have the valve stem tightened down as if the valve was off. Don't over tighten the gland nut otherwise the valve stem wont turn.

If it's a sealed system then ~ 1.2 bar is more than enough, no need for any more than that, certainly not 2 bar.

I managed to get it back in and like you stated if you do over tightening it it does effect the valve operation.

All back and zero leaks (I had blue roll wrapped all around it).

The boiler is still losing pressure though BUT I think it may be the expansion vessel as the pressure jumps about when CH is on.

Can’t check if it’s going out of the overflow as it all in overflow pipe and goes direct into concrete!!

They have run it through Downpipe brackets and into what o presume was an old watwe outlet then you can see where they have concreted over.

Time to get a plumber in I think.

Cheers guys.