InIn the last few months the pipes shakes on the top floor (third Flo) of the building where the boiler are housed. It does it every 3-4 minutes and I can't sleep. The valves have checked and are fine. Someone told me that air might be in the line, if so how do you remove it? Someone else told me that I need to install another valve in a different location but was not sure that would solve my problem but is very costly. Is there a solution to this problem?