Soil plumbing

The chalet bungalow upstairs bathroom.
Are there likely to be any issues with arranging a short 45 deg. fall in the toilet waste pipe?
The current plan is a vertical outfall terminated at a manifold above the soffit. There is insufficient space to get this high enough to accept a full *horizontal* run. Probably 2m level, 45 deg. bend, 800mm and another 45 deg. to the manifold.
I will arrange a vented (AAV) stack inboard to be higher than the basin overflow.
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Tim Lamb

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On 07/08/2018 08:47, Tim Lamb wrote:

Generally best of you can do it near the source end, but usually ok so long as most of the run is within the recommended falls (typically between 1 in 10 and 1 in 80 for 110mm soil pipe).
Its quite common to need a little bit of pipe height adjustment near soil stacks for example.

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Cheers,

John.
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OK. Sadly the basin waste can't conveniently be used as a flush.
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Tim Lamb

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the water will leave the solids behind......

that is going to be noisey .......
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On 07/08/2018 08:47, Tim Lamb wrote:

Our second toilet exits through the wall, turns 90° and then immediately descends at 45° for about 800mm, before changing again to a normal "horizontal" run. There was no choice, as there was a window half-way down the stairs, between the toilet and the stack, preventing a straight run. It has worked fine for 9 years now, but from the outside, it is quite a bit noisier than the pipe from the other toilet.
SteveW
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Hmm.. I'll let you know how I get on:-)
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Tim Lamb

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