What is the purpose of a gas line pressure tester and how is it used to ensure the safety and efficiency of gas lines?

A gas line pressure tester is used to check for leaks and ensure that gas lines are operating at the correct pressure. By pressurizing the line and monitoring for any drops in pressure, the tester can identify leaks that could pose safety hazards or reduce the efficiency of the system. This helps to prevent gas leaks, potential explosions, and ensures that the gas system is working properly.