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Posted by HeatPro on January 11, 2009 at 18:40:32:
In Reply to: Re: New boiler, high pressure, ~1gal/day used. posted by Pearson on January 11, 2009 at 18:13:16:
I know people like rules of thumb, so for people who want to set their own pressure:
"For every half-mile that your top-most one-pipe steam radiator is above the boiler, increase the boiler pressure 1 psig."
Is your highest room 1/2-mile above the boiler? Is your house taller than the Empire State building or the Chicago Tower? Does this sound ridiculous? Will the next person that suggests setting the pressure in your one-pipe system above 1-1/2 psig sound ridiculous to you, also? I hope so. Have a professional set the pressure control to 1-1/2 psig high limit and the differential to turn the burner back on at 1/2 psig, so the boiler pressure averages 1 psig -- the design pressure.
http://www.heatpro.us/steamtree/index.html
As the air release valves on the radiators of the one-pipe system get crushed at over 4 psig - go to the plumbing supplier and buy all new ones to replace all your damaged valves.