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Posted by HeatPro on March 21, 2008 at 20:23:51:
In Reply to: Re: Normal Boiler Pressure Range posted by ziad on March 21, 2008 at 20:13:11:
So ... if you no longer have leaks; but your pressure does exceed 25 psig during the coldest week or before, you can follow from the page:
http://www.heatpro.us/designtree/documents/C50A025C4A1CACEC77F1C2B34CE7FBEE228C9569.html
"Optionally, you can install another expansion tank next to the old expansion tank on a common"