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Can steam pressure ever be too low??
I made some tweaks to my steam boiler this fall. One change was replacing the "hissing" main vents. Replaced all my Hoffman main vents (74's and 75's) with Gorton #2's (3 main vents total). Also gave them all AT LEAST 8" vertical clearance from the main (previously were threaded straight into the mains). The overall pressure in the system dropped considerably- so low I couldn't detect it. I added a compound gauge and a 0-3psi gauge (kept the code-required 0-30). The pressure never builds up over 4 inches H 2 0 (~0.145psi) when firing; stabilizes at ~-0.07psi (vacuum) when idle (not firing).
Is there any downside to pressure this low?
I've read all of Dan's books. I cant even get the pressure up to 0.5 psi! Did I go overkill? Will I damage anything?
The results have been pretty amazing- the house heats much quicker and evenly... and my fuel $$ dropped nearly 300%... all in line with what Dan says in his books.
All replies welcomed.
Thank you all.