I am installing a Basement Bathroom that is using a Sewer Ejection system tying into our Septic System.

I noticed that the plumber connected the Toilet and Tub into the Main Intake within the Ejector housing; yet they then tied the Sink Drain into the Vent Intake Pipe instead of the Main Intake the Tub and Toilet share.

Is this type of configuration an acceptable connection to make from the Sink Drain Through the Vent Pipe into the Ejector Housing?