What is the recommended method for testing for leaks in plumbing systems?

Using a pressure test in conjunction with a manometer is the recommended method for testing for leaks in plumbing systems due to its effectiveness and reliability. This method involves pressurizing the plumbing system and measuring the pressure over time. If there is a leak, the pressure will drop, indicating the location and severity of the issue.

Manometers provide precise measurements of pressure changes, making them invaluable for diagnosing leaks in the system. By combining a pressure test with this tool, inspectors can accurately assess the integrity of plumbing systems, ensuring that all connections, joints, and pipes are secure and free from leaks.

In contrast, visual inspection alone may miss hidden leaks, particularly those located behind walls or underground. Listening for sounds of dripping may not be practical in larger plumbing systems where sounds cannot be easily localized. Checking for water discoloration can indicate leaks but does not provide definitive proof or locate the source of a problem. Thus, the pressure test with a manometer stands out as the most thorough and effective technique for leak detection in residential plumbing.