What is one major consequence of not properly testing low pressure gas lines?

Not properly testing low pressure gas lines poses serious safety hazards, with the potential for gas explosions being a major consequence. Gas lines that are not thoroughly checked for leaks can result in the accumulation of gas in enclosed spaces. If this gas comes into contact with an ignition source, it can lead to an explosion, which not only endangers the individuals in the vicinity but can also cause extensive property damage.

Proper testing ensures that the integrity of the gas line is maintained, helping to identify and rectify any leaks before they escalate into dangerous situations. This process is crucial for maintaining a safe environment in homes and businesses where gas appliances are used. The other options, while they relate to gas line issues, do not carry the immediate and catastrophic risks associated with gas explosions.