Check Valve, Checking

WARNING: This page is about a different car, the 2016 Volkswagen Beetle, 2015 Volkswagen Beetle, 2014 Volkswagen Beetle, and 2013 Volkswagen Beetle. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Checking Check-Valve

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

The check valve -A- must allow air to flow through in the direction of the arrow.
The check valve must remain closed for opposite direction.

Observe correct installation position!