How can you verify that an interior metal water piping system is bonded?

Verifying that an interior metal water piping system is bonded is primarily accomplished through a visual inspection of the piping system itself. During this inspection, one would look for physical connections between the water piping and other grounding systems, such as the electrical grounding system or other grounding electrodes. Proper bonding ensures that there is a low-resistance path for electrical faults, which helps to minimize the risk of electrical shock and ensures that the system can effectively handle any fault currents.

The visual inspection can reveal whether grounding clamps are properly installed and if the connections are intact. This method is essential for ensuring safety and compliance with electrical codes, which mandate that metallic water pipes be bonded to prevent potential electrical hazards.

Other options like checking water quality, measuring the temperature, or evaluating water flow rate do not provide relevant information about the bonding status of the water piping system. These aspects pertain more to plumbing efficiency or safety but do not directly indicate whether the bonding connections are secure and compliant with safety standards.