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Posted: Tue May 20, 2008 1:28 pm
by scotty123
I need to lay waste pipes from 3 showers/toilets. The run to my existing septic tank (its a large brick built one) is about 10 metres and down quite a hill. Could someone tell me the maximum fall I can get away please? I am using plastic pipe.
Posted: Tue May 20, 2008 5:45 pm
by lutonlagerlout
1:40,if you have a steep gradient you need to tumble it then maintain the 1:40 fall to avoid separation
LLL
Posted: Tue May 20, 2008 5:46 pm
by Suggers
Just go to search - type "maximum fall" - et voila....
Posted: Tue May 20, 2008 7:26 pm
by scotty123
Many thanks chaps