Joined: July 2004
||Posted: 20 Nov. 2019,13:57
That's relatively steep, but not to the point of being ridiculous.
You can lay at 1:5, if you wish, but the alternative would be to lay the pipe at, say, 1:20 or thereabouts, and then use a drop shaft connection where it meets the existing... Dropshaft Connection
Personally, I prefer dropshafts as they keep the flow rate sensible and they reduce the amount of excavation required.
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