Plumbing runs are typically modified throughout the design process due to architectural or structural modifications to the system requirements. For example, if the architect increases the size of a room, the corresponding plumbing system supplying that room needs to be modified. You might need to lengthen the plumbing lines, add fixtures, or reroute the plumbing lines for the room.
Several grips are available in AutoCAD MEP 2022 toolset to modify components in a plumbing system.