Which part of a plumbing inspection often requires checking for leaks?

The correct choice highlights the importance of inspecting all visible plumbing connections during a plumbing inspection for potential leaks. This encompasses various components, such as pipes, joints, valves, and connections throughout the plumbing system. Leaks can occur at any visible junction where water might escape, and identifying these issues is crucial in preventing water damage and ensuring the overall integrity of the plumbing system.

While faucets and drains, fixtures and fittings, and the hot water heater are all specific areas that might have leaks, the most comprehensive answer is that all visible plumbing connections require checking. By inspecting each visible connection, you can identify any small leaks or potential hazards that might otherwise go unnoticed, thereby ensuring that the plumbing system remains in good working order. This thorough approach is fundamental in a complete plumbing inspection.