interior soil pipe

[kevinmachell]

Can anyone please tell me a simple method to break into an existing internal soil pipe in order to put in a connection branch to take another toilet. The soil runs up inside the property and vents through the roof tiles. The existing toilet is in the first floor bathroom and I would like to install a ground floor toilet on the other side of the cavity wall. The present soil impossible to either lift or lower. I had in mind cutting a section out and reconnecting rather like one would with external drains.

Of course, if this is not feasible I am left with digging and fitting an Inspection chamber in the existing foul drain outside of the property. Albeit, a much bigger job.
many thanks for viewing. kevin View media item 88940 View media item 88940

 

[JimCrow]

use 2 slip collars,

http://www.plasticpipe.uk.com/110mm-slip-coupler-double-socket-6576-p.asp

and,
https://www.youtube.com/watch?v=4CWtom0IFmQ

 

[kevinmachell]

Many many thanks Jimcrow. I wasn`t aware of these slip couplings for grey soil pipes, so it is just like using slip couplings underground. I also wasn`t sure if the building regs allowed it either. Perfect solution for my problem. This then is going to be my plan of action. Just one more question please, it might sound silly but does it not matter about having inspection chambers or rodding points at junctions when above the ground?

cheers kevin