Vacuum Check Valve

Suit Nissan Patrol GQ And GU Models

This is a 3 way,  One way valve that goes in between the brake and clutch Booster.

This valve is designed to isolate the clutch and brake system from each other, so if one unit has a leak it doesn't stop the other from working.

we also sell an inline check valve, and most systems have one or 2 of these through the system also,

if you are chasing a vacuum issue, it is also common for the rubber hoses to go hard and not seal properly at the clamps