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 (with regard to hot steam)? 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.:p

What you are trying to accomplish is really quite basic and should not be a problem. The info you received from the plumbing supply company is right on the money as far as removing old paint. You will also need to make sure that switching a larger radiator into a new space is going to fit. Also, make sure the fittings are the same size on each radiator or you will need to swap them in order to reconnect them. One other suggestion is to buy new purge valves if any of the existing ones are not working properly. The purge valves allow the cold air in the radiator to escape as steam is rising into the system from the boiler. If the purge valves are not functioning properly you will not get the proper heat from the radiator. Also, if the purge valve does not shut off at the proper time you will be losing steam from the system and will need to replace the lost water in the boiler more often.