This is a very useful video tutorial for Revit users. By watching the tutorial, one can learn how to use Revit 2017 for adding sanitary sloped piping.
There are different methods to use a slope to piping:
The slope commands on the ribbon can be applied at the time of drawing piping.
The slope controls related to an obtainable pipe can be used to produce small slope values or modify the slope for definite pipe segments.
The slope editor is used to produce slope to a complete system or parts of a system.
Draw piping at the preferred angle in a section view or an elevation view to assign large slope values.
The slope options on the ribbon can be applied to identify the slope while drawing horizontal pipe in a view. This process is usually applied to identify small slopes.