bath and sink waste

[ihaventgotacluewhattodo]

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?

Thanks

 

[bernardgreen]

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.

 

[TicklyT]

I believe either is permissible, but there are certain areas to avoid to prevent crossflow, such as teeing opposite within a couple of hundred millimetres below WC etc, but teeing at right angles at the same level is permissible etc. etc.

The 'connections ' page here may help a bit.

http://co-uk.wavin.com/master/maste...621&middleTemplateName=oc_middle_content_link