Double riser nipples were a long asked for improvement that was included in HydraCAD Version 50 when it was first released.The dialog associated with this command does not generate too many questions, probably since the graphic helps make sense of the options available:
Once thing that does generate questions is how to go up one riser while going down to the other. I got this question twice in the last week:
Customer #1:
"How do we show this in plan view so that we have riser
nipple text indicating pipe going down from the feed pipe and riser nipple text
indicating pipe going up from the feed pipe. When I use the stacked command it only give me either 2 up
texts or 2 down. I can’t get one of each."
Customer #2:
"I need this drawing in 3d and I don’t know how do a pipe up
and down at the same time. See attach dwg as a reference. Could you help me,
please."
Here is how this is done (click to enlarge). It relies on the riser nipple editor featured in this post.
This sample drawing will be included in a future update and will be accessible by picking HydraTools->Tools->Training Drawings
The H-Factor 
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