In message , Steve Walker
writes
On 07/08/2018 08:47, Tim Lamb wrote:
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.

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.

Hmm.. I'll let you know how I get on:-)

--
Tim Lamb