House in Progress. Apparently, these homeowners were dealing with common hammering in their steam radiators and took the matter into their own hands, doing a little simple maintenance work with the help of This Old House. One particularly easy thing they did was shim the feet of the radiator furthest from the pipe that carries water back into the system. This assures water is not trapped in the system. See more in this video, "Maintaining a Steam Radiator", from This Old House. Do AT readers have any other tips for clanking steam radiators?