Simple questions, I hope:
When planning the run of the waste pipe from a new shower, do I calculate the fall from the shower tray surface or from the shower trap outlet?
I'm working on a required fall with 40mm pipe of 18mm per 1m and I have a 2m straight span to cross. Is this correct?
When planning the run of the waste pipe from a new shower, do I calculate the fall from the shower tray surface or from the shower trap outlet?
I'm working on a required fall with 40mm pipe of 18mm per 1m and I have a 2m straight span to cross. Is this correct?