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Because most modern tanks have a safety valve in them. If you open the valve too quickly, the valve will think that nothing is hoked to it and will shut off the output of the tank. Close the valve on the tank, dissconnect it from the regulator to let off the pressure and reset the check valve. Reconnect to the regulator and open the tank valve slowly..

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16y ago

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A propane tank may vapor lock if the pressure inside the tank becomes too low, which can occur if the tank is nearly empty or if the temperature drops significantly. When the pressure drops too low, the propane may not vaporize properly, leading to poor fuel flow and potentially causing equipment to malfunction.

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11mo ago
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Q: Why would a propane tank vapor lock?
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