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Leaking Soil Stack !

Discuss Leaking Soil Stack ! at UK Plumbers Forums; I've attached a picture below of a leaking PVC soil stack that needs to be repaired. As can be seen, the leak is coming from the bottom of the stack ...
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    Default Leaking Soil Stack !

    I've attached a picture below of a leaking PVC soil stack that needs to be repaired. As can be seen, the leak is coming from the bottom of the stack from what
    appears to be a socket ! My first inclination was to cut a small section ( about 3 inches) out of the stack about two feet up from the leak and then pull the
    lower part of the stack out in order to see the best way of making the repair.

    There is a horizontal branch (for a toilet) about 8 feet up from the ground that goes directly into the house so this should support the upper part of the stack
    while the repair is done. However, once the repair is made, a slip coupling would have to be placed over the cut segment of pipe but this would then obviously
    not give any support to the upper half of the stack !

    Removing the stack completely to make the repair would be a nightmare because of the horizontal branch going back directly into the wall for the WC.

    Any advice would be appreciated.

    Thank you.

    Leaking Soil Stack !-stack.jpg

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    Default

    Would be easier as a two man job, one to loosen and lift the top half of the stack, and one to slip in the new section of pipe. You may have to lift the top half of the stack up, pull the tee off the horizontal branch then start from the bottom again.


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    Default Re: Leaking Soil Stack !

    Quote Originally Posted by TBServices View Post
    Would be easier as a two man job, one to loosen and lift the top half of the stack, and one to slip in the new section of pipe. You may have to lift the top half of the stack up, pull the tee off the horizontal branch then start from the bottom again.


    Sent from my iPad using Tapatalk HD
    Thanks for the response TBServices.

    The tee is turned back directly to the wall and the branch is cemented straight into the wall. If the top of the stack was lifted up out of the tee there would still be no way of removing
    the bottom part of the stack from the tee as the tee is fixed directly into the wall with no movement available.

    Thanks again.

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    Oh I see! Well in that case it seems you're out of luck. Short of taking it all down I can't see another way of doing it right. Maybe someone else will have an idea


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    Default Re: Leaking Soil Stack !

    Bashing out a bit of concrete and making good on the outside won't be too much of a problem if you need to remove WC branch too. It's all down to how much of a headache it is to get it back to looking ok inside and how round the houses it goes from WC to stack.
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    Default Re: Leaking Soil Stack !

    Can you put a clip directly below the branch to support it

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    Default Re: Leaking Soil Stack !

    have you checked its not blocked seem like a lot of leakage i assume the water is coming out of the floor ? before cutting the stack id check for blocage and then cut back round the base see whats there chances are it just needs a cement fillet replacing round the drain

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    Default Re: Leaking Soil Stack !

    www.ebay.co.uk/itm/...Rubber-Coupling...Soil...Pipe...-/4001728548...

    you could cut the stack then use a rubber fitting, don't look much but give more flexibility
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    Default Re: jjjjjzzzz

    Thank you for all the posts.

    Quote Originally Posted by glenno1 View Post
    Can you put a clip directly below the branch to support it
    Yes I could do but there would be sufficient support from the tee branch that goes directly into the wall to not make this necessary.

    Quote Originally Posted by stevetheplumber View Post
    have you checked its not blocked seem like a lot of leakage i assume the water is coming out of the floor ? before cutting the stack id check for blocage and then cut back round the base see whats there chances are it just needs a cement fillet replacing round the drain
    I must admit I hadn't considered a blockage. The leakage is coming out from around the seal below the end of the socket just above the ground level.

    Quote Originally Posted by Simon F View Post
    www.ebay.co.uk/itm/...Rubber-Coupling...Soil...Pipe...-/4001728548...

    you could cut the stack then use a rubber fitting, don't look much but give more flexibility
    This link doesn't seem to working but, at a guess, is it rubber slip coupling with jubilee clips at each end ?

    Quote Originally Posted by Firestarts View Post
    thats interesting my friend, good
    What does this refer too ?


    Thanks again.

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    Default Re: Leaking Soil Stack !

    I would say that if that brown stuff is .... I would lift a manhole to eliminate a blockage first before you cut into . IMHO

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    Default Re: Leaking Soil Stack !

    Quote Originally Posted by tipintim View Post
    I would say that if that brown stuff is .... I would lift a manhole to eliminate a blockage first before you cut into . IMHO
    It was a quick visit but, despite how the picture looks, I certainly don't recall it being "brown stuff".

    However, I'll now certainly be lifting a manhole cover before I even consider cutting into the stack !
    tipintim likes this.

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    Default Re: Leaking Soil Stack !

    Ok, I know this was over a year ago but the customer was supposed to come back to me and they never did.................... until now. Things are still the same and the job now needs to be done.

    I can confirm that there are no blockages. The bottom fitting is a plastic double push fit coupling from standard black soil pipe to a larger underground plastic. The reason why it's leaking is that the rubber seal in the double coupling connecting on the red/orange underground pipe side has literally dropped out of the coupling. To me, this implies that the seal was pushed out when the stack was first installed as it wouldn't just fall out of its own accord. Additionally, there is a leak from an access panel so higher up so two leaks all together. The stack cannot be lifted as there is a right angle branch going directly into the wall approx 2.5m above the leaks for a toilet on the second floor.

    I have tried to find a similar push fit plastic coupling the same as the one in the picture but all I can find is a rubber coupling. The only way I can see doing the job is to cut about 6cm out of the pipe above the access panel and lift out the remaining soil pipe and coupling. Install a new coupler (plastic if I can find one, rubber if not) plus a new piece of pipe (with inline access panel if I can find one) and then a rubber slip coupling.

    I'd welcome any other alternative idea's or advice please.

    Thank you

    Leaking Soil Stack !-stack3.jpg

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