Quote:
Originally Posted by scrubjaysnest
. For some reason( a check valve maybe) it takes an open, no regulator or other fittings, pol connector to vent.
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There is a safety valve that prevents gas from escaping if the valve sees a high sudden flow such as that of a damaged or opened valve with nothing attached. This is important to remember because if your gas lines are empty ( as could happen if tank was run dry) the sudden rush of gas when the valve is opened with no initial resistance(pressure) can fool the safety valve into closing. This happens a lot on portable setups when several appliances ( stove, lantern, grill) are connected to a tank with several feet of hose each.