BTW. If the main stack is not that far away, and it is vented, then you
won't need the air admitance valve on your new section.

Unfortunately it's about 8m away. :-(


I did this recently and found that the end of the elbow (or tee) needed
to start inside the wall to get the turn in the right place so that the
external pipe run can be clipped correctly.

Thought that might be the case - seems reasonable. Do you know roughly what
size hole that requires? Presumably 130mm or so?


You can get WC pan connectors designed to do exactly this:-

http://www.mcalpineplumbing.com/product_menu.htm

Found those just after I sent my original post - d'oh! That's do the job
perfectly. Ta!


Yup - there is enough give to allow a 90 degree angle if required.

Cool - all problems solved. T'interweb's great. :-)

Cheers all!

Andy