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Should I break this mortar and see if drainage needs fixing?

Discussion in 'Plumbing and Central Heating' started by JP_, 23 Oct 2021.

  1. JP_

    JP_

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    Signs of damp - ground a bit wet, corroded pipe, and some woodworm on a joist.
    This is possible cause.
    Should I break up and see?

    IMG_20211023_164410072.jpg

    IMG_20211023_164434703.jpg
     
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  3. blup

    blup

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    Only if you are ready to repair any damage to the clay soil pipe that might well result, or have someone on hand who can do this and fit a plastic to clay pipe adapter.

    Is the damp/wet the result of a relatively recent repair, and just needs to dry out, or a leak from the copper pipe?

    Blup
     
  4. JP_

    JP_

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    Well, good point! Not sure. It could have got wet when I removed the toilet.... there's been no repairs recently

    The wet on the right is from when I used the tap to wash the soil pipe a bit earlier.
    But water didn't get over to the wall under the green corroded pipe.

    Leaking pipe is a possibility. Maybe I will leave it for a week - water pipes are being replaced and moved to centre of room on Monday, I've only cleared all the dust and debris out today, so will give it time to dry out. Maybe I will pour a few cans of water down the soil pipe if it looks dry to see if that makes it wet again. Toilet had not been used for about 2 weeks though, so it should be dry ...

    It is a mystery .... is the corrosion worse by the soil pipe because the pipe is wet, or is the pipe wet because the corrosion is worse ...
     
    Last edited: 23 Oct 2021
  5. JohnD

    JohnD

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    Bear in mind that if you don't do it while the floor is up and the joint is exposed, it will be a hundred times harder once the floor is down and the new bathroom is fitted.

    salt-glazed clay pipes are notorious for cracks, leaks, and bodged "repairs."
     
  6. JohnD

    JohnD

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    yes, be ready for that.
     
  7. JP_

    JP_

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    for now I've shoved a tissue under the water pipe, will see if this stays dry.
    I'll ask my plumber on Monday if he does drainage too.
     
  8. tell80

    tell80

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    Like blup said you should be able to use a plastic to clay but better you get a plumber in to do all the soil and waste and renew all the supply and c/h pipework and open up and clear that mess of sand and cement.
    If he doesnt do drainage then hes not a plumber.
    Maybe you lift the joists and mark all your fixture centres then install a new floor joist arrangemeent thats firmly fixed and well ventilated.
    Does the salt glaze run to a manhole - if it does then it can be tested for leakage.
    Wheres your soil and vent stack?
     
  9. JP_

    JP_

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    When the extension was done on the other side of the wall, the builders said that the clay pipe leading to the drain was damaged, and they replaced it with plastic from the outside of the house - here's a photo
    IMG_20180416_170002224.jpg

    the vent stack is off to the right on the new external wall - the right one here

    IMG_20180417_170004153.jpg

    old pipe before it was replaced
    IMG_20180412_171244672.jpg
     
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  11. JP_

    JP_

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    tissue dry, no immediate sign of the corroded pipe leaking ...

    I can take my time, the new window won't be ready for a few weeks
     
  12. Harry Bloomfield

    Harry Bloomfield

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    In your second photo - It looks as if the right hand timber might have rotted out and been replaced in the past, judging by the supported joint.
     
  13. JP_

    JP_

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    That is possible, there was a lot of rot along that side of the house (this is the final room I am renovated, 6 + hall already done), although I assumed the previous bathroom fitter just removed it and bodged it to get the drain in place!
     
  14. JP_

    JP_

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    So, how do I do the leak test? I assume just shove something in the drain outlet and fill the drain to the top and watch?
    What is a big drain plug called, where can I get one delivered from quickly? I might need to pop to wickes this week actually

    IMG_20211024_144916822.jpg
     
    Last edited: 24 Oct 2021
  15. Hugh Jaleak

    Hugh Jaleak

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    Am I right in thinking your pictures in Post 1 and 8 are of the same pipework, just either side of the wall, and the only bit of Salt Glazed left is actually where it passes through the wall? I suppose thats all now buried under the floor of the extension? Ideally would have been better to replace the lot, given how short the section is through the wall and under the floor.
     
  16. JP_

    JP_

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    Yeah. THe extension work was done in 2018, and at the time this was our only bathroom, so we weren't going to start breaking that up. Hopefully it will all be fixed soon ... looks like I need to DIY it, or seek a drainage guy.
     
  17. JP_

    JP_

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