WARNING: This page is about a different car, the 2005 Infiniti FX45 and 2005 Infiniti FX35. However, it is still accessible from the selected car via links, so may be relevant.
CHECK VALVE SPECIFICATIONS
Vacuum leakage [at a vacuum of -66.7 kPa (-500 mmHg, -19.69 inHg)]
Within a vacuum of 1.3 kPa (10 mmHg, 0.39 inHg) for 15 seconds