Plug for HW air vent?

Patrick North

Refinishing an old wall rad that had at one time been used as a HW rad- I'll be using it with one pipe steam. I'm going to have them powdercoated and want to plug the 1/4" tap where the old air vent went (and I'll have to tap a new one for the steam vent). Is a brass plug appropriate here, or will I have issues with expansion/contraction?
Thanks,
Patrick

tim smith

Plug for air vent

Usually that is an 1/8" npt plug for that, I would use an iron plug, easily obtainable.

Steamhead (in transit)

Either type will work

just dope or tape it properly and it won't leak, especially on less than 2 pounds!.

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Patrick North

Thanks-

I'll post some pictures once it's done- this is the rad that's (surprise!) needed a couple of left-handed plugs, courtesy of the illustrious Christian Egli.
Thanks guys,
Patrick