turbo oil return pump

[gui67]

Hello
I have a pump for the return of oil from the turbo to the pan because the turbo is in the back.
pump from RBracing:

Is there a problem to plump the pump directly on the bottom of the turbo? I heard the pump might make vacuum in the turbo housing.
First I was planning to put a vented can between the turbo and the pump but I wonder if it is really needed or not.
What is your experience for those using a return pump?
Thanks
Guillaume