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05-29-2012, 09:36 PM #1
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Blue residue on gas shut off valve
Very pretty shade of blue residue on a gas shut off valve, would guess the gas lines were last inspected in 1959 based on the tag by a nearby furnace. My gas leak detector did NOT indicate a leak (though it did go off when I put it near the draft hood of a nearby 53 year old furnace).
Wondering what sort of chemical reaction would cause this? Suspect the valve is copper; would it be copper sulfate from condensation?
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05-30-2012, 04:13 AM #2
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Re: Blue residue on gas shut off valve
Verdigris - Wikipedia, the free encyclopedia
Someone must have spilled something on it.
Keep the fire in the fireplace.
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05-30-2012, 04:52 AM #3
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Re: Blue residue on gas shut off valve
Someone sprayed it with soapy water to check for leaks, and didn't clean it off.
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05-30-2012, 05:58 AM #4
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Re: Blue residue on gas shut off valve
Yep, that is what it looks like....
Originally Posted by Dom D'Agostino
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