I've got a rather complicated soil pipe run to install and I'm at a bit of a
loss as to whether what I'm trying to do will even be possible. A picture's
worth a thousand words etc. etc. so here you go:-

http://www.pciq.co.uk/pics/soil.gif


The first problem is that as soon as the soil pipe leaves the building
through a 2ft thick brick wall, it needs to turn 90 degrees and head towards
the soil stack. Can I even put a 90 degree access bend directly against the
brickwork like this, or will it cause the adjoining soil pipe to be too far
away from the wall to attach the supporting clips?

Secondly, I'd like (if possible) to run my sink waste into this soil pipe,
to avoid the need for a second waste pipe to weave it's way around the w/c
etc. By my understanding this means I'll need some form of horizontal T
connector directly attaching to the pan. I'd then run a standard section of
soil pipe to the right of this, along to the sink, with a screw-on end cap
for access. The sink would just have a single vertical waste drop (hidden
behind the pedestal) and attach to the soil pipe with a 40mm strap boss.

Can you actually get a T pan connector that would allow this? I assume
public lavatories must have something like this, allowing several w/c's to
connect to the same horizontal soil run?

Thirdly, I gather the stub stack can just be attached via a 92.5 degree
access branch turned on it's side?

Anyway, some pointers and guidance would be greatly appreciated!

TIA,

Andy