I need to move a steam radiator about six feet from its current location. This is a single pipe system with black pipe. The piping is all accessible in the basement.
I have zero experience working with iron pipe, but I'm pretty good with copper. I know that part of the boiler plumbing is copper (the manifold coming out of the boiler).
Is there any reason that I couldn't go back to a convenient joint, install a dielectric union, and finish the job in copper (with another dielectric union at the radiator end)?
OK, I just went downstairs and took a look at the boiler installation. Where the iron steam pipes connect to the copper manifold, they used copper threaded adapters with no dielectric unions. Where the condensate pipe attaches, they used compression fitting , which, I guess could be an insulator, but since the steam pipes are tied together, I'd have no way to check that.
So, is it possible that in a steam pipe, which is not under water all the time like the condensate pipe is, that you don't need dielectric isolation between iron and copper? This boiler was installed 24 years ago, and there's no visible sign of corrosion at these joints.
I am aware of the slope requirements, and I have plenty of headroom to do that. I don't want to use iron because, as I said, I have zero experience with that. I don't have threading equipment, and even though I'll measure twenty times before I cut once, I don't have much confidence that everything will line up on the first try, and that's yet another trip to the supplier to get yet another piece of pipe threaded.