What type of test may be conducted using peppermint oil?

The primary purpose of using peppermint oil in plumbing systems is for leak detection. When peppermint oil is introduced into a system, it can easily travel through small leaks or cracks. As it has a distinct odor, the presence of peppermint oil at any point outside the system indicates a leak. This method is particularly effective because it allows for the identification of leaks that may not be visible through visual inspection alone.

Other tests, such as pressure tests, water tightness tests, and air pressure tests, are designed to measure the integrity of plumbing systems under various conditions, but they do not utilize peppermint oil as a means of leak identification. Instead, they often assess the system's performance in more quantitative methods, like measuring pressure changes or observing fluid movement under controlled conditions. Thus, in the context of detecting leaks, the use of peppermint oil is a unique and practical approach that clearly aligns with the objectives of a leak detection test.