But if people told us they did some remolding that required them to screw with the piping.
We'd know to look closer.
This was one that the contractors disconnected it during constriction 2 owners ago and the last owners just never needed any heat. They just told the current owners that that radiator didn't work.
As a side note this was also the source of the constant bleeding of the system to get the air that was stashed in the empty pipe.
Once I got it all fixed there hasn't been any noise since.
I could tell you about the sewer pipe that didn't connect to the sewer, but I won't go there. It was meant to be a temporary disconnect 15 years earlier. The only way I will get rid of that memory is a 9mm to the head.
My idea of a perfect day: No where to go and all day to get there.