Seems like the 45/45 is the way to go, but I don't want my liquids to run
away from my solids. In keeping with the theory of a multi story house.
its
all 90/90 to get from floor to floor.

So what should I do??

Thanks,
Scott-


There is such a thing as minimum slopes for sewage lines, but not a
maximum slope. The more slope, the better. The liquids running away
from solids and causing clogs theory is a myth. High flow velocity is
good. See this:

http://tinyurl.com/kz2gj