What is a critical safety measure when checking for gas leaks?

Using a soapy solution is a critical safety measure when checking for gas leaks because it allows for the easy detection of escaping gas. When a soapy solution is applied to the joints and connections of gas lines, any escaping gas will cause the solution to bubble up where the leak exists. This can be a straightforward visual indication of a problem without introducing any risk of ignition, which could occur if a flame or spark were used.

Other methods, such as using a lighter, pose a significant danger as they could ignite any escaping gas, leading to an explosion or fire. While wearing gloves can provide personal safety, it does not aid in leak detection. Calling a technician is advisable for more serious concerns or repairs, but it does not help in the immediate detection of a leak. Therefore, utilizing a soapy solution is both a practical and safe approach to identifying gas leaks in a controlled manner.