Ask a Tradesman
I'm installing a new toilet on the ground floor. how deep below the floor does the drain outlet need to be?
You need to look at where the nearest drain/manhole is and open it. Then measure down to the pipe, this will give you an idea of how deep you need to go then measure the distance between toile and manhole the waste pipe has to drop towards the manhole at 1 in 40 ( 1 meter = 4 cm drop min) good luck.
Answered 12th Jul 2011