I just drained a radiator to eliminate banging, but it didn't work as well as I hoped. I also removed the valve and put some teflon around the stem, because it leaked I see from a stain.
There was another radiator on this extension on the floor below, but it was removed years ago. I haven't checked the valve. It's now inside a small cabinet. I have to move it.
Could the pipe be clogged? The pipe system is undoubtably 70 years old. Any thoughts?
John