Heat Exchanger: water weight for hydrostatic test FEA

[FPPE]

Hi,

I have to consider the weight of the water inside the inner volume of an entire Heat Exchanger for the Hydrostatic Test FEA.
How can I consider it? If I set the hydrostatic pressure as external load applied to all internal surfaces (normally to them) does the software consider the weight of the water automatically?

Thank you very much

 

[FEA way]

SolidWorks Simulations offers features such as remote mass and distributed mass to account for weight of components that are not modeled directly.

 

[FPPE]

Thank you very much!