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Posted by Harold hydronicnetwork.net on January 18, 2004 at 08:21:48:
In Reply to: noise from boiler posted by jim on January 17, 2004 at 21:22:23:
Read:
http://64.226.150.132/hydronic/service/purgeair.htm
Also, with the expansion tank ABOVE the line, it might be installed upside-down, trapping air. See:
http://64.226.150.132/hydronic/des/start.htm#Expansion