I brew outside w/ a propane burner, and use Blue Rhino propane tanks as the fuel source.
Well, in the middle of the boil for today's batch, my first tank ran out. No big deal, I hooked up the full spare tank and turned on the valve.
And i heard a loud hissing sound and immediately smelled propane. Uh-oh.
Investigation led to the valve/knob assembly on the propane tank as leaking/defective.
Called up Kroger's (where i get my tanks swapped) and told them what happened.
They said they'd swap out the tank for free and contact Blue Rhino to take them to task.
Crisis averted.