HELP!! i intend to put a branch in my underground drainage its 110mm plastic but with no movement at either end is it possible to buy some sort of slip fitting 't' piece?
if you was doing it how your surpose to your building control would have told you what to do.
but it sounds like you haven't contacted your local council.
so are unable to help you as their are proper steps to take before digging up drains.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix plumbing.