Why should you check for air leaks at each gladhand connection between units in a doubles or triples combination?

Pick an answer

1. Only the first gladhand connection needs to be checked
2. Gladhand leaks only affect the unit directly in front of the leak, never behind it in the combination
3. A leak at any connection point can reduce overall system pressure and affect braking on units behind it
4. Leaks at gladhand connections are purely a cosmetic issue

Correct!

Not quite. The correct answer is highlighted.