When the Conduit tool is selected, the Modify | Place Conduit tab provides options for placing conduit.
Create Riser: lets you create a vertical conduit while working in the editor. Pick a start point and elevation, choose a new elevation in the Properties palette, then click Create Riser. You can also use it while laying out conduit by changing the elevation and clicking Create Riser to add a vertical segment.
Inherit Elevation: inherits the elevation of the element being snapped to.
Inherit Size: inherits the size of the element being snapped to.
Add Vertical:sloped pipe connects using the current slope value.
Change Slope: sloped pipe connects directly regardless of the slope value.