Which of the following components is not tested during a plumbing inspection?

During a plumbing inspection, the primary focus is on components related to the plumbing system, which includes the sanitary sewer, gas connections, and water service. Each of these is crucial for ensuring that the water supply, waste removal, and gas systems are functioning properly and safely.

The correct answer pertains to electrical wiring, which is not a component evaluated during a plumbing inspection. Instead, electrical inspections focus on the electrical system's safety and compliance with codes, which is a separate discipline from plumbing. While there may be overlaps in construction, an inspection for plumbing will not assess the condition or compliance of electrical wiring. This distinction is important for understanding the specialized nature of building inspections and the responsibilities of different trades.