Yes, but it should be within 3 feet of the attic access opening (the code is fuzzy on the distance, but it must be accessible, and, if there is no walkway to it, then it needs to be able to be reached from the attic access opening).
However, it still needs *at least one* vent open to atmosphere outdoors.
If that is the 4" vent, then that is likely the one intended to vent outdoors to atmosphere.
That is required to be 6" above the insulation, so it meets that.
Also, it needs to not be reduced in size, other than that is to be the Maxi-Vent and must be sized for 4" vent. (
STUDOR (R) inVENTive Technology (TM) - Air Admittance Valves )