What method is used to check for a leak around a fitting?

The method used to check for a leak around a fitting is bubble solutions. This method involves applying a solution that contains soap or similar agents to the area of the fitting being tested. If there is a leak, the escaping gas will create bubbles in the solution, making it easy to identify the source of the leak visually. This technique is effective because it provides immediate visual feedback, allowing for quick and accurate detection of leaks without requiring extensive equipment or complex procedures.

Other methods, while also useful in leak detection, do not provide the same level of visual confirmation as bubble solutions. For instance, visual inspection may miss small leaks that do not show visible signs, sound tests rely on the perception of audible cues that may not be distinct, and heat detection typically involves more advanced technology for temperature changes, which might not directly indicate a leak around fittings.