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Discuss 3 inch lead soil pipe in the Sanitary Ware area at UKPlumbersForums.co.uk.

  1. brian32128

    brian32128 New Member


    my current toilet has been in for over 30 years and is connected to a 3 inch (83mm) lead pipe which goes straight through the wall to the cast iron pipe. The centre line of this lead pipe is also around 80mm from floor level whereas the centre-line of the 4" (102mm) outlet on the new toilet is 180mm from floor level.

    What are my options please?

  2. joni os

    joni os Plumber

    Replace all or part of cast pipe with plastic. Branch off and come through wall at required height in 100mm.
    • Like Like x 2
  3. jtsplumbing

    jtsplumbing Plumber GSR

    Time to get the cast cutter out,
    • Like Like x 1
  4. Chalked

    Chalked Plumber GSR

    The lead should come out of the tee in the soil pipe. You can then put in a cast yo plastic adaptor, and replace with plastic to the correct height.
  5. Last Plumber

    Last Plumber Plumber GSR

    I would recommend as above. Replace the soil pipe. Proper job !
    • Like Like x 1
  6. brian32128

    brian32128 New Member

    In the end i took the rubber grommet thing off the outlet of a flexi pipe leaving the plastic only which had an internal diameter of about 85mm, so i stikaflexed this to the 83mm OD lead pipe, so far so good only had one blockage (to be expected with expecting 4" of waste into 3"), not perfect but i'm selling the house so wanted to do it as cheap as poss...