Pinholes in copper vent pipe

Discussion in 'Plumbing Forum, Professional & DIY Advice, Tips & ' started by chel_in_IL, Nov 12, 2007.

  1. markts30

    markts30 Commercial Plumber

    Messages:
    630
    Location:
    Phoenix, AZ

    The condensation tends to form and collect on the horizontal pipes only...
    Chances are all the horizontal piping in the home (copper waste piping I mean) has a similar problem... In the vertical piping it would tend to drain...
  2. Verdeboy

    Verdeboy In the Trades

    Messages:
    2,051
    Then, wouldn't you expect the holes to be on the bottom of the horizontal pipes, since any droplets that would theoretically form, should pool up on the bottom, rather than the top.
  3. kordts

    kordts In the Trades

    Messages:
    551
    Location:
    exurban Chicago
    It's the gas. Towns with sulphur in the water are notorious for this. Usually it's the top of the drain lines, but sometimes the vents.
  4. chel_in_IL

    chel_in_IL New Member

    Messages:
    36
    Location:
    Northern IL (bbrrrr!!!)
    I checked all the other copper piping in the house, and they all look fine. It's a small house, and all the piping is confined to one area in the basement, which is accessible near the furnace (nothing in the walls, except for the upstairs bathroom that I am remodeling).

    As you guys found this interesting, here's a pic of what the inside of the pipe looked like. There was about 1/2" of powdered corrosion sitting in the bottom of the pipe... (but the bottom of the pipe didn't have -any- holes).

    [​IMG]
  5. Raucina

    Raucina Previous member

    Messages:
    515
    scrap as much copper as you can saw out and it will pay for the new plastic pipe and maybe a short vacation.
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