In fairness to all, we don't discuss pricing on the Wall. Thanks for your cooperation.
I live on the 6th floor of a 6 floor NYC residential building, 9 apartments per floor, single pipe steam. Every time the heat goes on, I hear clanking sounds from the radiator in my bedroom. There are one or two clanks at the beginning of the heating cycle, about a five minute pause, and then a slow, irregular continual clanking that lasts for 10 minutes or more. It's loud enough and annoying enough to keep me from being able to sleep in my bedroom. When my downstairs neighbor closes the shut-off valve on his radiator below mine, there is no sound. So, it is related to his radiator, but he hears only a very faint sound that seems to be inside the wall, not in his radiator.
This clanking started last February, about the same time as my neighbor had partially closed the shut-off valve on his radiator in order to control the heat, and caused it to leak. I don't know if that has anything to do with the noise I hear, or if it's just a coincidence that it started about the same time. Since then, his shut off valve has been replaced. I never heard this clanking before in the 11 years that I have lived in this apartment.
Does anyone have an idea of the cause or the cure? Our plumber wants to install a temperature air control valve on my neighbor's radiator. Will this help?