The BREAK command breaks an object between 2 points that you specify and optionally creates a gap between the new objects that are created.
In AutoCAD MEP 2024 toolset, when you use BREAK to break segments of duct, pipe, cable tray, or conduit, or to break plumbing lines, the software connects the 2 new segments if the first and second specified break points are the same. However, when you break a segment where a takeoff is connected, the software connects the takeoff to only 1 of the 2 new segments. You should reposition the takeoff as needed.
You can break one or more duct, pipe, cable tray, or conduit segments into multiple segments of a specific length.