Boiler's pressure relief valve has be spitting lately and looking a bit crusty. Replacement is on the way. Not sure if the Extrol 30 expansion tank is good or bad. Sounding the tank ... seems to indicate it is full of water ... https://share.icloud.com/photos/0Lg8UVQY60_rOo13Zeo2g9-QA
But quick check at the Schraeder valve hisses dry air.
?
Cheers
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