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Unused Steam Runs On One Pipe Steam System
I recently moved into a 1922 colonial house with a one pipe steam system. I've been updating the system and performing much needed maintenance to the boiler, radiators, and vents. I've added all new Gorton vents on the rads, new #2's on the mains, a 5oz pressure gauge on the boiler and I've set the pressuretroll as low as it can go. There are several branches of the main in the basement that no longer run all the way to a radiator. Or the radiator was moved and the old line is still there.
I've removed as many as I could (the smaller diameter pipes (see attached pics)) but my question is, should I remove some of the larger branches that are no longer used (see pics). Do they retain air and hamper steam movement? Do they speed up or slow down venting? Should I leave them alone or get out the big wrench and breaker bar?
Any input is most appreciated!