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Does anyone know why the joints on the copper piping near my steam boiler are turning black?
My gas steam boiler was installed 24 years ago and seems to be working fine. I flush out any rust and clean the burners every year. However, I just noticed that the joints near the copper fittings have turned black, and it looks like the solder joints may be starting to fail.
Should I be concerned?
u/Roysterama — 9 hours ago