European plumbing union help

[hawkwing]

I have an Al-Ambiq 20L alembic still I picked up used from a guy near me. It’s the premium edition with the brass plumbing unions to connect the onion head to the swan neck and then to the condenser.

I would like to get a set of these unions so I can build a reflux column. Being made in Portugal I assume they are metric and probably different than what I can get locally. I’m hoping someone knows what size and thread they are and maybe then I have a chance to buy a set on eBay or Amazon hopefully.

I looked into getting a reflux column from the manufacturer in Portugal but it’s cost prohibitive.

Thank you.