Well yesterday was the day to visit the local scrap yard to see what goodies could be found.
This followed me home:
Looks to be almost new. I have no idea what it was used on as it was already loose and laid off to the side. When I asked about it, the yard guy said I could buy it if I wanted. Thought it might work for a project floating around in my head. When I got home and started messing around with it, I discovered that one end has what appears to be an air bleed.(red circle) I removed the line and the cap.(green arrow) Thinking that the "fitting" (blue arrow) was removable. It presented more resistance than I thought it should so I stopped trying to turn it.
My question is the "fitting" (blue arrow) removable? If not can I just use the mig and weld up the air bleed? Although there is not a lot of money invested (~$8) I don't want to screw this up. Any advice to my next course of action?