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Posted by Harold hydronicnetwork.net on January 25, 2004 at 09:55:52:
In Reply to: Re: one pipe steam vent controls- water trapped posted by Gary on January 25, 2004 at 09:33:38:
Yes, steam systems are designed to run at 1 psig.
Read:
http://64.226.150.132/hydronic/steam/steam1.htm