The default union fitting of the MEP curve type.
Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 25.0.0.0 (25.0.0.0)
public FamilySymbol Union { get; set; }
This property is used to retrieve the default union fitting of the MEP curve type, and can be . if there is no default value. Use RoutingPreferenceManager to set this property for PipeType MEPCurves.