How can one manually create a new hydraulic model (lay down pipes, nodes...) using the modelBuilder without existing data source?
To add to Sushma's reply - ModelBuilder can be used with external data, but manual layout is also possible.
If you are new to WaterCAD, the following article has many learning resources to help you. This includes how to manually lay out elements using the layout tools.
Learning Resource Guide for new users of Bentley WaterGEMS and WaterCAD
Regards,
Jesse DringoliTechnical Support Manager, OpenFlowsBentley Communities Site AdministratorBentley Systems, Inc.