Which plumbing system requires annual inspection according to the code?

Hot water heating systems require annual inspection according to the National Plumbing Code of Canada. This requirement is primarily due to the potential risks associated with such systems, including the danger of overheating, pressure build-up, and scaling or corrosion, all of which can lead to system failure or hazards if not properly maintained. Regular inspections help ensure that the system operates efficiently and safely, addressing any issues before they become serious problems.

In contrast, while other systems might have maintenance and inspection recommendations, they do not specifically mandate an annual inspection in the same way hot water heating systems do. This distinction highlights the need for regular oversight on systems that involve significant heating and pressure, which can pose greater risks if not properly monitored.