The Model Integrity Check tool compares the Links, Nodes, and Catchment Areas in the graphics to the Drainage and Utilities database. It displays a list of elements that are not synchronized between graphics and the database and allows you to delete them. This option should be used with caution because it deletes the data. A good practice is to take a screen capture of the elements before you delete them so that you can review the resulting model and recreate any elements that are needed.