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Thread: Seeking advice - Attempt replacement of hose bibb leads to a corroded pipe

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  1. #1
    DIY Junior Member bang0r's Avatar
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    Default Seeking advice - Attempt replacement of hose bibb leads to a corroded pipe

    My attempt to replace a hose bibb (3/4") was not successful due to very tight access to the connecting pipe ( attachment hose.bibb.JPG.) Luckily, the other side of the wall is the garage. After cutting out the wall panel, I find out the other end of the pipe the bibb connected has undergone some severe corrosion (attachment pipe.JPG.) and I can feel some moisture around the corrosion. Also a ground copper wire is attached to this pipe.

    I'd like to tap this forum for its collected wisdom and advice to tackle such task, prior to finalize how to proceed with replacing the hose bibb and the pipe.
    Here are some of the questions I have:
    1) What is a recommended way to chisel out the cement around the pipe behind the hose bibb?
    2) The house was built in the 70s. Is replacing the 90-degree elbow (attachment pipe.JPG.) also the right thing o do, when the pipe and bibb are replaced?
    3) Should the ground wire be attached to other part of the pipe system, before the defected parts are taken out.
    4) Regarding threading the pipe to get a water-tight connection, I vaguely recall there is a rule of thumb on keep turning until about 3 to 4 threads exposed. Any advice on best practice and cautions to maximize the success of getting a water-tight connection will be appreciated.

    Thanks in advance.

    -bang0r
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  2. #2
    Home Builder ckl111's Avatar
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    That picture looks more like a galvanized iron pipe than copper. That is surprising for a house built in the 70's. Where does the iron portion end?

    What is the copper wire grounding? Your picture looks more like a 1/4 copper tube than a copper wire, perhaps a primer tube for a floor drain or a supply for an icemaker?

    You don't really need to chip out the concrete. You can probably knock the pipe loose with a hammer once you get the fittings off.
    Last edited by ckl111; 04-22-2012 at 08:39 PM.

  3. #3
    DIY Senior Member Hammerlane's Avatar
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    Can you provide a photo further back of the 1st photo above?

  4. #4
    Moderator & Master Plumber hj's Avatar
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    1. There is no "good" way. You have to do whatever is necessary.
    2. The elbow is fine as it is
    3. The ground wire is also fine where it is
    4. Forget any "formula". You tighten it is as much as you can, and if it leaks, you tighten it some more.
    Licensed residential and commercial plumber

  5. #5
    DIY Junior Member bang0r's Avatar
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    Attached is the pics per Hammerlane's request.
    Thank you for all the replies.
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  6. #6
    DIY Senior Member kreemoweet's Avatar
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    You would do well to have someone familiar with house wiring to check out the purpose of that "ground" connection. For one
    thing, the pipe clamp appears to be of a type used on telephone and other low-voltage wiring, and not approved for use in a house
    electrical system. For another, all grounding connections of that type are required to remain accessible, and not buried in a wall as that
    one appears to be. All-in-all, a very dubious setup.

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