PVC to Clay

Discussion in 'Plumbers' Talk' started by Jimbo, Nov 29, 2021.

  1. Jimbo

    Jimbo Screwfix Select

    I've found a PVC soil pipe which is basically resting on the clay drain collar with what appears to be a solvent weld coupler. There's no evidence of it ever having backed-up but it can sometimes create a smell.

    Obviously a drain connector should be in the clay collar then the PVC pipe dropped in to that, however that's going to be very difficult as the whole stack is going to be left unsupported if cut and a slip coupling would also be needed.

    Therefore I wondered if a foam or paste type product could be used to fill the 1" or so gap around the pipe to the edge of the clay collar and if so what to use. Basically create a seal around the collar (which was filled with lose sand) before back-filling with screed.

    Many thanks indeed!
    Last edited: Nov 29, 2021
  2. Jimbo

    Jimbo Screwfix Select

    Here it is:

  3. Notnowvicar

    Notnowvicar Active Member

    That just looks like a clay pipe has been used to stop the plastic pipe being deformed when the slab was poured...why not just sand and cement the hole...thats what was there before the screed was removed in the corner.

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