"Britannica" wrote in message
...

The plumber who came to look at it said we needed a 'specially made'
cylinder for solid fuel heating and was going to order one but he's
been rushed into hospital.

Suggestions for a supplier would be helpful, and am I likely to be
able to get a cylinder with suitable threads on the connections ?

http://www.solidfuel.co.uk/frame/main.html ?

I think the tank, in an emergency, has to take the maxium output
from the solid fuel fire and dump the heat somewhere.