On Fri, 05 Jan 2007 21:46:28 +0000, Tim.. wrote:

Anyhow I have a slim-line single convector rad in the hallway where the
Square of the bleeder core is broken off, and the radiator construction is
such that there is no room between the bleed valve itself and the body of
the rad to get a socket on it to unscrew the whole unit.

You mean the bleed screw is recessed into a sort of shroud in the steel
at the end of the rad?

Maybe you could bodg^H^H^H^Himprovise an alternative bleed point at the
other end of the rad (or the back surface at the top) by drilling &
tapping another hole & fitting a brass screw with perhaps a tapering slot
filed along its length so that it seals with a washer between the screw
head and the metal. Or BES do some bleed valve assemblies which you might
be able to fit.

May just be easier to replace the rad if it's not too big & expensive &
odd-sized.