When you specify systems for equipment, fixtures, and plumbing lines as you draw, AutoCAD MEP 2023 toolset inserts plumbing fittings based on the default fittings specified for the associated system definition. For this reason, you should specify default fittings for the plumbing system definitions that you are using for a project. You can specify default fittings for 4 types of fittings:
- Elbows
- Tees
- Crosses
- Transitions
For example, you can specify that a base tee be placed as you draw rather than a straight tee.
Note: If your design requires unique fittings, you can override the default fittings for an individual run or add a fitting manually.
To specify the default fittings for a plumbing system definition
- In the Plumbing workspace, click
. 
Note: Alternatively, you can select a fitting in the drawing, and click
. - In Style Manager, select the system where you will specify the default fittings.
- On the Defaults tab, specify the type of fitting and click OK:
- Elbow Tip: As you draw a system, the software adds elbows as needed and the corresponding elbow styles to the drawing. The type of elbow you specify here, in conjunction with the angle of the elbow that is added, determines the name of the elbow style (for example 60 Degree Standard Radiused Elbow). Because the elbow styles are stored in the drawing, you can apply them to other elbows during layout modification.
- Tee
- Tee Up
- Tee Down
- Cross
- Transition
Note: If a list is empty or does not contain the desired fitting, click Import, select a fitting, and then click OK. Because the software draws elbows dynamically based on the direction of the run, there is no import option for elbows. - Elbow