+ Reply to Thread
Results 1 to 9 of 9
  1. #1
    Join Date
    Mar 2011
    Posts
    3

    Default Water Heater Outlet Pipe Exterior Corrosion

    My water heater is not leaking water. However, the hot water outlet pipe, where it is connected to the extension pipe, has a green and rust colored flaky corrosion building up on the outside. I suspect that this is related to the hardness of the water within our public water supply. The water heater is guaranteed until 2014 with a double anode rod setup. Should I be concerned about the corrosive flakes? If so, what would you recommend that I do? Many thanks!

  2. #2
    Join Date
    Jul 2010
    Location
    SoCal
    Posts
    6,533

    Default Re: Water Heater Outlet Pipe Exterior Corrosion

    What type of pipe is it? brass, copper, galv. etc?
    knowing that will make it easier to suggest a remedy.

  3. #3
    Join Date
    Mar 2011
    Posts
    3

    Default Re: Water Heater Outlet Pipe Exterior Corrosion

    Although I do not know the composition of the pipe leading directly from the water heater, the extension pipe is definitely copper. Thanks!

  4. #4
    Join Date
    Dec 2010
    Location
    Houston Texas
    Posts
    2,969

    Default Re: Water Heater Outlet Pipe Exterior Corrosion

    Green is an indication of copper pipes. Verdigris is the name of the "rust".

    Verdigris is fairly normal but there shouldn't be much if any. It sounds like you've got a pinhole leak and that is making more verdigris.

    My advice; Take it apart, clean or replace the copper bits, use Teflon pipe dope to re-assemble, tighten securely without muscling it to death. Or use those stainless steel HWH connector pipes.

  5. #5
    Join Date
    Mar 2011
    Posts
    3

    Default Re: Water Heater Outlet Pipe Exterior Corrosion

    Many thanks!

  6. #6
    Join Date
    Feb 2012
    Posts
    3

    Default Re: Water Heater Outlet Pipe Exterior Corrosion

    I've got pretty much the same thing going on at my house as the original poster, but this seems to have just set on in the past 1 mo and the heater is approx 7 yrs old. Would there also be an anode rod issue (as I have a Bradford-White) with a combo anode/outlet? Gavanized pipe (from wh) to copper.

  7. #7
    Join Date
    Jul 2010
    Location
    SoCal
    Posts
    6,533

    Default Re: Water Heater Outlet Pipe Exterior Corrosion

    Quote: " Gavanized pipe (from wh) to copper. "

    If your galvanized pipe is in direct contact with copper, you will have future problems.

  8. #8
    Join Date
    Feb 2012
    Posts
    3

    Default Re: Water Heater Outlet Pipe Exterior Corrosion

    I am probably wrong that it is galvanized - but it is definitely not copper or brass (referring to the hot water outlet).

  9. #9
    Join Date
    Jan 2008
    Posts
    2,091

    Default Re: Water Heater Outlet Pipe Exterior Corrosion

    A magnet will not be attracted to anything but steel and more weakly to iron (not used as supply piping), so if a magnet sticks, it's galvanized- guaranteed.

    Phil

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •