I have an old steam radiator in my back apartment bedroom (American
Radiator, model unknown but at least 50 years old). The pipe that feeds
it gets plenty hot and runs from floor to ceiling in our bedroom. It
gets hot enough to heat the room by itself. The problem I have is I
want to turn the radiator that this pipe feeds into, off. I've tried
turning a wrench at the inlet, where I think the turn-off valve is, but
nothing moves. Might be the paint, might just be stuck. I'm just
wondering what I have to do to turn the radiator off, what kind of
wrench I need, etc.

Thanks,
James Sedlock
New York City