What aspect is crucial during the inspection of plumbing systems?

The focus on compliance with installation guidelines and functionality is fundamental during the inspection of plumbing systems. This aspect ensures that the plumbing adheres to the established standards outlined in the National Plumbing Code of Canada, which is crucial for safety, efficiency, and reliability. Compliance with these guidelines not only guarantees that the system will function as intended but also minimizes the risk of issues such as leaks, backflow, and other potential hazards that could arise from improper installation.

Evaluating the functionality ensures that all components work together effectively, providing the necessary water supply and drainage capabilities. It encompasses aspects such as proper venting, correct sloping of drainage pipes, and the ability to withstand various pressures and temperatures, all of which contribute to a well-functioning plumbing system.

While aspects such as the color and size of pipes, visual appeal, and installation speed may have some relevance, they do not hold the same weight in terms of ensuring the plumbing system's reliability and compliance with safety standards. The primary goal of an inspection is to verify that the installation meets regulatory requirements and functions correctly over the long term.