Can anyone identify these 1940's hydronic fittings??

[elevatorman]

I'm at a bit of a loss here? Obviously all the valves need replaced, but, the tubing and valves are steel. How were these originally sweated?? Do they make these fittings anymore? With a dial indicator the tubing measures .502" diameter. Any ideas on my options? And as I got shunned and booted on a previous forum... I'll post pics.. These are 1/2" OD steel tubing.

 

[IFIXH20]

Looks like copper tubing and brass globe valves

 

[elevatorman]

Magnets don't stick to copper... Please help!!

 

[badgermilker]

They are a steel hydronic tube. Most of them that old we're stick welded with rod and an acetylene torch. Brass rod and a torch is what I have used before

 

[elevatorman]

Ok, so you brazed them... Where do I find fittings with 1/2" od??

 

[johnjh2o]

They are copper plated steel lines. It was used in the 40's. Because of world war II copper wasn't available. 1/2" copper fittings will fit with some effort.

 

[elevatorman]

Thanks guys, good info. I'm assuming no one makes a fitting to convert this to 1/2 copper or even pex?