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Posted by HeatPro on November 04, 2007 at 19:48:53:
In Reply to: Re: EXPANSION TANK posted by pete on November 04, 2007 at 03:41:16:
Circulators for home systems only have about 6 psi max to move water. 12 psig water in the system will circulate as a purge valve is opened.
Read:
http://www.heatpro.us/purgeairtree/