The time has come where @Onoffis about to get some competition on duration of a thread     I am finally at the stage where I need to get my shower waste pipes in before I put the mesh down for the UFH.  So far I have painted on the floor where the walls waste and shower head will go. Iv also marked out where i will be forming the “shower area”   my question to you all today is what size pipe would you recommend for the shower waste?  The branch I have sticking out o