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Thread: Tub Drain Leak

  1. #1
    Engineer jk60's Avatar
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    Default Tub Drain Leak

    The drain (2" dia) to my tub started leaking from pin holes in the pipe. I came up with an on the spot temporary fix using a plastic half pipe smeared inside with some roof tar and attached using cable ties, picture below. Works without any problems. I just would like to confirm that I can do a permanent fix by cutting out the damaged section of pipe and then adding a new section of pipe tying it to the old pipe using rubber sleeves and full clamps on the ends (not sure what the exact name of these sleeve/clamp combinations is). Thank you ahead of time for any information you can give me.

    Jerry
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    Plumber Cass's Avatar
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    Yes you can. I would replace as much of the pipe as you can. The couplings you want are called banded couplings. They have a band of smooth stainless steel around the rubber and the 2 clamps. Don't use the banded couplings with corrogated stainless around them.

  3. #3
    Engineer jk60's Avatar
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    Cass - Thank you very much for your input. Now I know exactly what to do and buy.

    Thanks,

    Jerry.

  4. #4
    I&C Engineer (mostly WWTP) Lakee911's Avatar
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    Quote Originally Posted by Cass
    Yes you can. I would replace as much of the pipe as you can. The couplings you want are called banded couplings. They have a band of smooth stainless steel around the rubber and the 2 clamps. Don't use the banded couplings with corrogated stainless around them.

    What's the difference?

    (I've got a supply line in the basement w/ a pinhole leak fixed in a similar maner...I know, I know... I just keep forgetting to fix it when the water is off. I'll replace the section when I do my kitchen remodel. Will need to move some plumbing and HVAC and electrical, etc....)

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    Engineer jk60's Avatar
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    As it ended up I have a few more questions. They are as follows:

    The damaged pipe is a galvanized pipe, therefore...

    1) Should I replace it with same or use a PVC pipe?
    2) If I install a PVC pipe, is considerably more noise going to be noticeable with this pipe?
    2) Is the OD of the PVC pipe same as the OD of the galvanized pipe?
    3) Is installing a PVC pipe in this application where it joins galvanized sections, meets code?

    Thank you,

    Jerry

  6. #6
    Plumber Cass's Avatar
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    Quote Originally Posted by jk60
    As it ended up I have a few more questions. They are as follows:

    The damaged pipe is a galvanized pipe, therefore...

    1) Should I replace it with same or use a PVC pipe?
    2) If I install a PVC pipe, is considerably more noise going to be noticeable with this pipe?
    2) Is the OD of the PVC pipe same as the OD of the galvanized pipe?
    3) Is installing a PVC pipe in this application where it joins galvanized sections, meets code?

    Thank you,

    Jerry
    1) Use PVC but it will need to be supported more than the gal.
    2) no
    2)Yes
    3)yes

  7. #7
    Plumber Cass's Avatar
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    Quote Originally Posted by Lakee911
    What's the difference?

    (I've got a supply line in the basement w/ a pinhole leak fixed in a similar maner...I know, I know... I just keep forgetting to fix it when the water is off. I'll replace the section when I do my kitchen remodel. Will need to move some plumbing and HVAC and electrical, etc....)
    The corrougated is for cast iron to cast iron connections.

  8. #8
    I&C Engineer (mostly WWTP) Lakee911's Avatar
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    Quote Originally Posted by Cass
    The corrougated is for cast iron to cast iron connections.
    Is there any reason why though? Only thing I can think of is cast wouldn't compress much and the corrugations (is that a word?) wouldn't slip past eachother and that would be ok. Otherwise you'd want a tight connection with the band sliding past eachother. Dunno.

    Quote Originally Posted by Cass
    Quote Originally Posted by jk60
    2) If I install a PVC pipe, is considerably more noise going to be noticeable with this pipe?
    2) no
    I've always thought cast iron was quieter than PVC and Galvanized is closer to Cast Iron than PVC, no? Wouldn't it be louder?

    Jason

  9. #9
    Plumber Cass's Avatar
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    The word you used was "considerably" and the answer is no. It is not "considerably" more noisy.

  10. #10
    Moderator & Master Plumber hj's Avatar
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    Default band

    In theory, the two pipes are not quite the same o.d., therefore the band has to have a slightly larger opening at one end than the other. The corrugated No-Hub couplings are a single size device, the smooth ones are trasition couplings with each end designated for a certain type of pipe. In practice, the No-Hub couplings are often used for that application, when the transition is not available, since the o.d. differential is very slight.

  11. #11
    Engineer jk60's Avatar
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    Replaced damaged section of galvanized pipe with about 5 ft of PVC pipe. Used the smooth SS banded couplings as recommended. Works like a charm. Thanks everyone for your advice!!!

    Jerry

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