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Thread: Sewer cleanout outside house is 8 inches too tall

  1. #1

    Default Sewer cleanout outside house is 8 inches too tall

    Hi all

    The cast iron sewer cleanout for my house is in a bad spot to be sticking up so high. It is about 10 feet outside my foundation wall and appears to be a 3" pipe sticking vertically out of the ground. But the pipe has a fitting that enlarges to a 4" at the end (just before where the cleanout plug is)

    So I'd like to dig into the soil around the pipe, cut it off below the grade and put on a new plug - then put a "valve box" (the plastic jobbies usually seen around sprinkler valves?) over top of it.

    I've never done any outdoor plumbing and I'm not sure if I'm overlooking something. Would I just put a rubber adapter (like a Fernco or Mission boot) over the cut end and then put on an ABS cleanout and plug?

    I actually have installed and replaced a lot of DWV inside of houses, but I don't have even a beginner's understanding of where this sewer cleanout leads to and what I should be considering as far as future access. I've never seen a diagram of where the waste pipe goes after it enters the basement floor!

    thanks,

    bingo

    steve

  2. #2
    Moderator & Master Plumber hj's Avatar
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    Default Co

    Cut it off, glue on a female adapter, then screw a plug into the adapter.

  3. #3

    Default PS It's cast iron...

    Hi HJ

    So you think the valve box isn't a good idea? I'm afraid of people not knowing where this cleanout is in the future...

    you say "...glue on a female adapter"> I guess I should have been more clear: it is a 1920s house and the sewer cleanout is cast iron. That's why I was thinking a Fernco was necessary. What material of adapter should I use to be code? And is there any reason to attempt to make the pipe 4" at the plug (like it was before) or should I just use 3"?

    Thanks again!

    Bingo

  4. #4

    Default HJ and all - trying to get a response

    Hi
    I don't mean to press but it has been a week and I didn't hear back from HJ or another plumbing expert. Can someone read my original post and my follow-up and help me sort things out? I'm doing this tomorrow!

    thanks
    Quote Originally Posted by bingo
    Hi HJ

    So you think the valve box isn't a good idea? I'm afraid of people not knowing where this cleanout is in the future...

    you say "...glue on a female adapter"> I guess I should have been more clear: it is a 1920s house and the sewer cleanout is cast iron. That's why I was thinking a Fernco was necessary. What material of adapter should I use to be code? And is there any reason to attempt to make the pipe 4" at the plug (like it was before) or should I just use 3"?

    Thanks again!

    Bingo

  5. #5
    In the Trades Gary Swart's Avatar
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    Default

    Your plan will work fine. Use a Fernco that will go from CI to either PVC or ABS, your choice. Stay with the 3", I see no reason to have a 4" hole immediately reduced to 3". A female adapter will allow you to use a screw-in plug. The irrigation box is a good idea. One alternate plan might be to figure how to hid the existing clean out with some shrubs and just leave it as is.

  6. #6
    Moderator & Master Plumber hj's Avatar
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    Default Co

    A female cleanout ferrule and a No-Hub coupling is all you need, once the pipe is cut off. I forgot, or missed, the cast iron part in my original answer because cast iron cleanouts are becoming very rare.

  7. #7

    Default thanks!

    Will do and report back any weirdness...
    sr

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