Why do you have to slowly loosen the filler valve and wait for the vent to stop before
disconnecting?
The filler valve may not be closed
The temperature of the venting gas is too cold for you to safely put your hands in it.
The hose-end valve may not be closed
The pressure is too high to manually release it until it vents.
disconnecting?
The filler valve may not be closed
The temperature of the venting gas is too cold for you to safely put your hands in it.
The hose-end valve may not be closed
The pressure is too high to manually release it until it vents.