This is Gay Mulvey working on a small retrofit in Dublin.(old pipe to new)
For any young engineer look to learn and get advice in this game go to the guy on the ground.
A good plumber will know far more than the majority of engineers.
Having worked with Gay Mulvey for around 25 years there is not a lot this guy cannot do.
From half inch copper pipes to 24 inch carbon steel ,he can do it all.
I could safely say he possibly one of the best trades man I have ever seen.
Just give the man a set of drawings and walk away.
Its sad to say Gay is close to retirement and we will never replace the likes of him.
Hats off to Gay.