A bottle line has an 8-station valve manifold running the cylinders on the reject and diverter section: two reject pushers, a lane diverter, a bottle stop, and a few clamps. An issue came up on second shift because the operator reported that the line was intermittently rejecting the bottle after a "low fill" and it's doing it on both rejectors. The tech noticed a constant hiss from the manifold and couldn't localize the leak. The tech did the following tests: Soap-tests ever