Mamod SR1A Steam Engine 

Thanks SuperNova and good question. I would say the boiler pressure is somewhere between 1 and 2 bar. I'll attempt to work it out and get back to you. By the way, with a name like SuperNova, you don't happen to be into Astronomy do you? ;-)

@@metalhead6828 since filming have you got some thing to remove the water from inside the boiler?

You are right, and yes I did give the whole engine a good clean before starting it up.