I have a toilet that I'll be replacing soon.
The toilet outlet angles downward that is far as I can measure,
about 19/20 degrees from the horizontal.
Have toilets trafitionally been made with a standard range of downward
angles, say for arguments sake,
20 degrees or 40 degrees as well as horizontal?

The new toilet has a horizontal outlet so I'll need to cut the pipe that
emerges through the wall
at the same angle as the old toilet outlet. So I'm hoping I can use a
standard offset fitting
to go on the new toilet, along with a straight adapter to join to the cut
pipe.

the pipe that I have to cut is an old thing with a collar. The collar will
be cut away so I can get the new close coupled affair close to the wall.
What kind of adapter should I be looking for to join
the old pipe to the new pipe?

Thanks.

Arthur