The Remove Isometric Offset command is used to return a pipe offset with the Offset Isometric or Offset Multiple Isometric command to its original location.
To remove an isometric offset, go to
Ribbon: DM Plumbing->Isometrics-> 
Remove Isometric Offset
Pulldown Menu: DM Plumbing->Isometrics->Remove Isometric Offset
You will be prompted to identify the isometric pipe from which the offset will be removed.
Select isometric pipe to remove offset:
The pipe will be returned to its original location.