The steps below will show how to save a hydraulic model in the ArcMap or ArcGIS Pro integrated versions of WaterGEMS, SewerGEMS, and HAMMER. In order to integrate with ArcGIS Pro, you will need WaterGEMS version 10.03.02.75 or later and SewerGEMS version 10.03.03.44 or later. The information below uses WaterGEMS as an example, but the general workflow is the same for all products.
Saving the ArcGIS Pro file is as simple as going to File > Save. To save the WaterGEMS file, go to the WaterGEMS tab in the Ribbon and click the Save button.
If you close the project, you will be prompted to save the WaterGEMS file if you have not already done so.
While there is Save As feature in ArcGIS Pro, there is not an equivalent for the WaterGEMS file. If you do a Save As on the APRX file, the WaterGEMS hydraulic mode will not save with a new name. If this is required, it is recommended to change the name of the WaterGEMS files and then add the hydraulic model to the new APRX file with a new geodatabase file.
Alternatively, you can open the APRX file in base ArcGIS Pro. Edit the geodatabase’s ProjectMap table, by dragging it onto the map so you can open the table so the path points to the renamed project. Then open the APRX in WaterGEMS for ArcGIS Pro. The hydraulic model will be opened in the location specified. Make sure you save the edits to the ProjectMap table (Edit > Save button).
In order to save your WaterGEMS for ArcMap file you need to open the Hydraulic Model Manager by going to product pulldown menu and then View > Hydraulic Model Manager (in older version, you would use the Project Manager found in the same menu). After the window is open there is a save icon on top of it, which is captured in the screenshot below. If the button is grayed out that means your model is already saved as the most current version.
If you save the MXD file, the WaterGEMS files are not automatically saved either. You will need to save through the Hydraulic Model Manager. It is not possible to do a Save As on a WaterGEMS model in WaterGEMS for ArcMap. This link has information on this: How to "save as" or copy a project in the ArcMap environment. You will need to manually change the name of the file before using it and add the hydraulic model back into the renamed MXD file.
WaterGEMS for ArcMap and WaterGEMS for ArcGIS Pro FAQs
SewerGEMS for ArcMap and SewerGEMS for ArcGIS Pro FAQs