Which soil stack components to order?

[ruggers]

I need some advice of some components to order for my external 110mm svp where it leaves the 1st floor bathroom on a masonry build.

 

I'll have 2no. vertical lengths of svp with a 67.5° branch in the middle.

 

The 117mm bathroom toilet core hole will have a 110mm plain pipe between inside and outside and then it will require an elbow, followed by 600mm horizontal section connecting the elbow to the svp branch.

 

1. Should the elbow be 87.5 or 92.5 and should it be single or double socketed?

 

2. I'm assuming one socketed end goes against the core hole to receive the pipe through the wall. If correct do you need to chase the external brick out some more so that the wider outside diameter of the socket end can be positioned part in to the wall and prevent it from sticking out away from the wall too much more than the bracket offset?

 

3. The horizontal pipe connecting the wall elbow to the branch will require plain pipe or a socketed end depending on single or double socket elbow. I wasn't sure if double socket is fine or its best to keep everything designed like a funnel by using the cut off socketed end from the 4m vertical svp if this makes sense?