Moving on...... Some, "Canyer just"s.
A member of my other forum loves his Mamod Flatbeds...... Old, toy steam engines....... Rare, and expensive.
They are fired by meths, and of course he loves to run them.
Unfortunately, he has to breath oxygen, for a lot of the time. Not a safe environment!

Could I make up some air adaptors, to fit in the water level hole? So, still allowing the use of the safety valve.

First problem..... What thread? Replacement parts dealer enquiries, indicated 3/16BSW, and 3/16BSF.
Exchanges, via postal service, of
known screws, finished up with 2BA, and 3/16BSW.
Partly made parts.........

Five off, despatched. The finished items, in situe.........

He is now able to run all of them at once! Absolutely delighted!

And my favourite charity, gained a generous donation......

David D