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Posted by HeatPro on December 08, 2004 at 06:45:43:
In Reply to: Re: air in hydronic system despite automatic vents posted by Dave on December 08, 2004 at 03:16:49:
An extra-large expansion tank or another one added at the same point as the old can handle the reduced acceptance volume.
http://64.226.150.132/hydronic/des/start.htm#Expansion