Upgrade Your Project from 2012 and Get Loopy!

Revit 2013 introduces a new Arrow Style for Loops, though it may not be immediately obvious how to use it in an upgraded project.

1. On the Manage tab > Settings panel > Additional Settings > select Arrowheads
2. Select any of the types, and click Duplicate...
3. Name the duplicate Loop, or something suitable, and then click OK twice.
4. Now, select a tag with a leader in a view (such as the Pipe Size Tag).
5. On the Properties Palette, click Edit Type.
6. Click Duplicate...
7. Name the new type 'Pipe Size Tag with Loop', and click OK.
8. Set the Leader Arrowhead to Loop (or whatever you named it in step 3.)
9. Click OK.

Your pipe tag now has a loop leader.