Thread: Required drop for toilet outflow
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The Natural Philosopher
 
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Default Required drop for toilet outflow
Hugo Nebula wrote:

From the chaotic regions of the Cryptosphere,
(grimmy) wrote on 31 Jul 2003 12:23:19 -0700:


Does anybody
know what the required angle of elevation is for the waste pipe of a
flush toilet?


The above-ground branch needs to have a fall between 18mm and 90mm per
metre run. The below ground drain needs to be no shallower than 1:40.



Not so. Below ground its advised to be between 1:60 and 1:100 and IIRC
not STEEPER than 1:40




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