Zex Bottle Leaking
If the bottle was cracked or comprimised it would have never passed the DOT Hyro test. most times it is the valve or the valve seal
Could be the blow off disk or other parts but a new valve is not that muchAt the price of juice thiese days even a new valve will pay for it self fast!
A quick check is to spray it down with regular NON-ammonia window cleaner
It should bubble at the leak...even a tiny one 



