If you already have an .mxd file for the model, click the Open button, browse to it in the Open dialog, then click Open.

In ArcMAP, click the Add Data button.

In the Add Data dialog that opens, browse to your model’s .sqlite file. Double click it and select the feature datasets, then click the Add button to add them to the map.

To start adding elements to the model, click the Editor button and select the Start Editing command from the submenu that opens.

Click the Sketch Tool button in the Editor toolbar.

Click the Start Node for the new pipe, then double-click the Stop Node to place the pipe.

When you are finished laying out elements and editing their associated data, click the Editor button and select Stop Editing from the submenu that opens. A dialog will open with the message “Do you want to save your edits?”. Click the Yes button to commit the edits to the database, No to discard all of the edits performed during the current editing session, and Cancel to continue editing.