bath and sink waste

27 Aug 2007
Reaction score
United Kingdom
Could someone please tell me what is right or wrong. I have just
fitted a complete new soil stack and bathroom suite. At the moment the
only thing connected to the soil stack is the toilet. I now have to
tee in the bath and sink waste pipes.
Could someone tell me is it OK to tee the bath and sink waste into the
soil stack above the tee piece for the toilet or should it be below
the tee?

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I was told (when building our house) to tee waste pipes to the stack above the toilet connection to avoid turblance in the stack ( from flushing toilets ) pushing material into the waste pipes.

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