kevplumb,
Thanks for the ID on the plastic coated copper, you learn something every day.
The rad has already been removed to enable plastering and the lock shield valve is holding however I don't have freezing gear, otherwise a good idea.
Cheers
Pic as requested
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This is actually a radiator in our house, the one in question is in my son's house but the fittings are the same.
The small leak is at the bottom of the chrome hex connector. The main problem is that as yet I haven't been able to drain the system as it must be...
When removing a single panel radiator I managed to twist the valve slightly. This has a small bore copper tail into a plastic pipe approx. 5mm diameter.
The connection is now weeping very slightly and I don't want to tighten it any more in case I aggravate the situation.
If I drain the...