Copper Soldering


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Old 10-19-06, 05:36 PM
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Copper Soldering

I have noticed on my cold water copper piping in the basement some ugly green powder which has developed around some soldered fittings (on top and bottom of the solder). What is this powder and why got there? Anything I can do to prevent this? Thank you
 
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Old 10-19-06, 06:05 PM
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green crude

Originally Posted by kolias
I have noticed on my cold water copper piping in the basement some ugly green powder which has developed around some soldered fittings (on top and bottom of the solder). What is this powder and why got there? Anything I can do to prevent this? Thank you
Could be excess flux remaining on the fitting and corroding the surrounding copper pipe.

Or, it could be microscopic leaks in the solder joints allowing some water to escape and with air, corrode the copper... Or, a mix of both!

Try cleaning the areas with an abrassive sponge, and get rid of any residues. If it comes back it is a leak, if it stays clean, it was flux residue...
 
 

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