can any one tell me if the under ground pipe has a fall of 1 in 79".
or is this wrong? someone told me that it was in the regs at 1 in 79".
but i've not read it myself.
can you help. p.s. 4" pipe is being used.
I'VE BUILT AN EXTENTION ONTO MY HOUSE AND NOW INSTALLING A TOILET DOWNSTAIRS. NOT SURE WHAT THE SLOPE OF THE DRAIN PIPE GOING OUT OF THE HOUSE SHOULD BE. ie.FROM THE BACK OF THE TOILET PAN TO THE OUTSIDE WALL, THEN DOWN TO THE MANHOLE. CAN YOU HELP!
