Can WaterGEMS, WaterCAD or HAMMER display elements in 3D?
Typically a water model is not suitable for 3D viewing as the 3D view would appear quite flat.
In the meantime, you can export a model to the Bentley i-model format, with the "Publish project elements in 3D" option checked. The i-model can then be viewed in another Bentley application such as Bentley View or MicroStation, in 3D. See link below for more on i-models.
What is an i-model and why does it show as a prerequisite? How do I publish an i-model?