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Posted by Jeff in Groton, CT on December 09, 2008 at 09:26:08:
I just replaced the vents on my main (1 pipe system) and noticed that boiler psi is reaching as high as 25psi. The main & radiator vents seem to be functioning but am concerned about the pressure. Is 25 psi too high? Could it indicate a partial blockage in the main that causes boiler pressure to spike in order to get enough steam out thru the mains to the radiators?
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