Ideally, the hot water feed would go to the top of the radiator, but a bottom connection works almost as well. the steam traps on the outlet would have to replaced with radiator ells, and the air vent would be moved to the top of the radiator. Also, the radiators must have a top tube joining them so that the water can cirulate through the radiator. Yours probably do, but some steam radiators were only joined at the bottom since steam did not need circulation at the top. The hardest part is usually getting parts unscrewed after years of baking in steam temperatures.: I have recently purchased a 40 year old house with the orignal steam boiler. I need to replace it and would like to go to hot water. Does it make any sense to do this? Is it within the scope of a DYIer to convert the cast radiators (includining the feed and return). If not can I 2 zone the steam system when I replace the boiler?
