# Junction

Plumbing Copilot supports Revit junction families that meet specific criteria to ensure compatibility with the routing process. The supported junctions must exhibit the following behaviors:

1. **Flexible Angle**
   * The junction must allow for a range of angles, including **45, 90, 60, 33.33 degrees**, or any other  value.
   * Negative angles are also supported.
2. **Fixed Angle Exception**
   * The software also supports junctions with a fixed angle of exactly **90 degrees**.
3. **Nominal Radius Parameter**
   * The junction must have a **Nominal Radius** parameter that accepts values greater than 0.
4. **Auto-sizing Capability**
   * The Junction must have the functionality to be **auto sized by Revit** automatically
