Further to my successful attempts to remove the brass valves in my old cast
iron rads, I have been unsuccessful in removing the iron bushes these valves
were mounted in. Now I'm having a bit of a dilemma;

I can keep trying to get the iron bushes out, using more leverage and heat,
but seeing as the rads are about 80 years old I'm thinking they're going to
be well and truly seized. I don't want to break the rads getting them out.
I can fit bushes within bushes to bring the inlet down to 1/2", ready to
take a standard valve, but the rads are currently plumbed for gravity feed -
ie connections top and bottom at one end. Is it possible to plumb them in
to a ring in this manner, or will the efficiency be affected? If so by how
much?

Thanks for your help!

Richard

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