Size of reducing bushes for cast iron radiators

[ChrisR]

Grahams should be able to help you (Beckhampton st)
You don't undo the painted hex nut, the rad tail will have a hex or splines inside. Often needs to be heated to reduce the effort to undo it.
To be clear, can you measure the diameter of the inside of the tail - ie the hole, visible in the pic you posted?
Most rad valves are "half inch" in there, 3/4 is a (expensive) possibility.

 

[rogerh]

One of these?

http://www.toolstation.com/search.html?searchstr=30616

 

[rogerh]

Most rad valves are "half inch" in there, 3/4 is a (expensive) possibility.

Guess what - it's 3/4"!

 

[doitall]

The easiest way is to take the old bush out and replace the lot.

Send me a pm

 

[rogerh]

I see that Screwfix sell 1" x 1/2" reducers but for £1.99 each...

Only 90p at Toolstation, though.