I would like to relocate single pipe steam radiators, basically swap some around by putting larger ones (in colder areas) where small ones are and vice versa. It seems that it should be easy enough to close the valve, disconnect the radiator and relocate. I have no education on this though and I am concerned about hooking them up properly (I understand about the necessary pitch) however what materials and procedures do I need to ensure a tight seal? I think I need an elementary education in plumbing. Please advise, I need to do this soon before the heat kicks on. Thanks.

Seeing I had so many reviews and no answers, I thought I would write in what I found out thus far from a local plumbing supply co.. To reassemble, make sure threads are clean (wire brush/steel wool if necessary), then add pipe dope (glue) to interface parts only (between the threads, has a smooth surface. That's it. Do not gum up the threads with anything. No plumbing tape needed. Also, I was advised while I have the radiators disconnected to take them to get sandblasted (old house paint) for the paint actually seals the heat in and makes the radiators less efficient. Then spray them with a high heat aluminum paint (will reflect heat outward) to protect them from rusting.