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DerbyDad03 DerbyDad03 is offline
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Default Green Sludge In Plumbing?

I was doing a little plumbing yesterday and came across something I
hadn't seen before.

I cut a 1/2 copper pipe about a half inch from a sweated copper
coupling. Inside the pipe was small amount of green sludge, almost
like a drip, about 3/4" long. The sludge was soft and easily removed
from the pipe.

Was this nothing more than some flux that had seeped onto the joint
and reacted with the copper?