Installing a new soil pipe connection for a loo today, I got to thinking.... The joint between the internal pipe that runs from the loo and the elbow that connects this to a branch which runs to the soil stack, will end up being buried in a wall. Now I know this must happen often, and I have never had a push fit waste connector leak in the past, but the ramifications of leak should one occur are obviously undesirable!
Is it usual to take any additional precautions to protect/seal the pipe joint in these situations? If so, what is recommended?
(the wall construction is approx 1" render -> galvanised steel expanded metal lath -> tilers felt -> 3/4" shuttering ply -> 5" PIR foam -> over
1/2" plasterboard, and finally tiles)