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The old 68mm to 63mm down pipe problem.

Discussion in 'Roofing and Guttering' started by dal5band, 18 Sep 2020.

  1. dal5band

    dal5band

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    I am removing a water butt with a diverter thing in the down pipe. I found that the upper pipe is 68mm ( having been upgraded inthe past) but the lower pipe below the diverter is the old 63mm. I notice that a 68mm pipe will fit over the old 63mm but it is a loose fit. Could I solvent weld this and achieve the conversion ? Then continue with 68mm fittings above.
    Does the solvent weld cement stick to the black downpipes ?

    PS cannot replace the 63mm as it goes into the ground.
     
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  3. Ian H

    Ian H

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    How far into the ground?
     
  4. dal5band

    dal5band

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    Job done ! I put a piece of 68mm over 63mm pipe with weld cement. Further sealed it with some old mastic. Left enough 68mm pipe above the joint to take a 68mm m/f joining socket. The downpipe goes into the socket, with a little adjustment (cuttin P_20200926_221708.jpg P_20200926_221648.jpg
    You can see where the old water butt stood on the raised slab.
    The 68mm is quite a loose fit over the 63mm pipe so needs to be held in place while the solvent cement sets. Hence the extra matic seal just make sure , a few hours later.
     
    Last edited: 26 Sep 2020
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