"The broker/dealer feels that it is okay as he can usually get it to stop by flipping the LPG breaker on and off a few times or airing out the boat. "
Let me run that through my Cynic/English Translator:
"The broker/dealer feels that it is okay as he can usually get it to stop by flipping the defective and unreliable LPG breaker on and off a few times and trusting that it might work when I really need it, or airing the real propane that has been building up short of explosive levels out of the boat. "
I'd say your broker doesn't have a proper respect for explosives and safety issues. "Bang on it, maybe the problem will go away" is NOT a good long-term policy around explosives. If he fails to understand the problem, call the manufacturer, and tell them this dealer is liable to cost them a couple of million dollars if they don't educate him.