| Hi -- the gauge seems like it must be at least in the ballpark, because when it reads really high, the radiators are behaving like they have really high pressure -- steam coming out the vents, spitting at a newly discovered spot that needed tightening on one radiator. The gauge drops to zero a little while after the boiler shuts off.
While changing the pressurtrol, my friend blew out the pigtail to clear it -- a little water came out but otherwise it seemed open.
Thanks for thinking about this!
Shemaya |