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40mm pipe to 200mm square drain

Discussion in 'Plumbing and Central Heating' started by rdougan, 20 Jan 2015.

  1. rdougan


    22 Sep 2014
    Thanks Received:
    United Kingdom
    Hey guys,

    I'm doing some renovations on my house and the current project is making a simple drain area. It is a simple rectangle shape. Approximately 120x45x50cm. It will be completely tiled, with a drain at the back. And the bottom will be sloped slightly towards the drain.

    The problem I have is: the current drain is a simple 20x20cm, which is square, and I need to have a new 40mm PVC pipe drain into that.

    I'm wondering what the best way to do this is? I've tried searching for some kind of adaptor, but I haven't found anything.

    Perhaps just a sheet of marine ply, and seal it with some silicon?

    I've attached some pictures so you get a better idea.


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  3. All the adapters appear to be round. As you say some sheet material silicone into place with a 40mm rubber boss adapter through a hole??
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