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New (Old) House - Vent Question
Purchasing an old house and new to steam. The boiler (an old Byrant - estimated at 40 years old) seems to work fine, but appears to be slow at delivering steam to the radiators. During a test fire today I'd estimate that it took 30 minutes for the first few radiators downstream of the header to start getting warm.
After the initial 30 minutes, all the radiators started getting hot, but the far ends (one pipe system) stayed cool far longer. Not sure what my expectations should be here.
My suspicion (given my reading of of this fine website) is that the radiator vents are clogged/not working and need to be cleaned or replaced - house has been vacant for 3 years and no one who could vouch for the maintenance of the system is presently alive to tell me.
Any advice on how to NOT snap off the vents in the radiators? I was planning on slow steady pressure, with perhaps some liquid wrench..plus maybe some heat.
Lastly, in terms of a main vent, there appears to only be ONE..located at the end of the return where it takes a 90 degree turn from the horizontal down towards the boiler.
From what I've read here, I want to have the main vent (and potentially more than one) in the supply leg to speed the movement of steam up towards the radiators.