what's the real story on this...

Discussion in 'Plumbing Forum, Professional & DIY Advice, Tips & ' started by DIY, Apr 17, 2008.

  1. DIY

    DIY New Member

    Messages:
    153
    Location:
    Florida
    Through my experiences i have seen it mostly on hot water heaters. Dissimilar metals. that over time cause a green whitish build up around two fittings of dissimilar metals that have been threaded ,or sweated together. When it is touched it breaks up like powder. I have asked about this and the answer i get is use brass nipples instead of die electric nipples that some HWH's come with for connecting the hot and cold water lines.

    My other question is: Is this build up of the funky green whitish stuff bad for the connection that can cause leaks and/or the pipe metal to break down etc.?
  2. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,233
    Location:
    Cave Creek, Arizona
    residue

    It is residue from a leak. The leak was just so slight that the water evaporated and left the minerals behind.
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