Can hydraulic model data be synchronized (imported or exported) with esri's ArcGIS Utility Network model?
Although integration with ArcGIS Pro is currently not supported (as of January, 2020) and is required to manage a utility network, you can still work with Utility Network data using ModelBuilder in WaterGEMS and SewerGEMS (in the Standalone version, for example).
First, create the Utility Network in ArcGIS Pro based on Esri guidelines (for example see this article) and then publish the network features to ArcGIS Enterprise.
Then, use ModelBuilder (for example in WaterGEMS Standalone) and connect to the features you just published, and build a model. If the data was published to an esri source such as a geodatabase, you will need to work within WaterGEMS for ArcMap. Or, the geodatabase could be exported to another format such as Shapefile, which ModelBuilder can import in the Standalone version.
Note that The Utility Model enables users to model things like pump stations in detail, but hides them from view in a ‘containment’. It would be prudent to check those to make sure they are importing correctly into the hydraulic model.
Also, if your utility network includes lateral pipes, WaterGEMS now supports laterals that connect to the pipe at a "tap" which does not split the pipe.
Using ModelBuilder to Import External Data