Hello:
Axial thrust depends of impeller design, i.e. Do you have an impeller with rear vanes?, the calculations are depending of pressure on impeller back side.
Regards
The problem isn't negative pressure, How much NPSH required by the pump?, if you have enough NPSH available above required minimum 2 feet above, no cavitation damage may be expected.
Regards
I am looking at purchasing same fluid flow waterhammer analysis program. I would like some input from others who use these programs, basically for water and gas uses