Red Seal Recreation Vehicle Service Technician Practice Exam

The plumbing system in an RV requires antifreeze during winterization to prevent water in the pipes, tanks, and fixtures from freezing and causing damage. When water freezes, it expands, which can lead to cracked pipes, split fittings, and ultimately expensive repairs. To winterize the plumbing system, RV owners typically drain all the water from the fresh water tank, as well as any drains or lines, and then introduce antifreeze into the system. This antifreeze not only protects the plumbing from freezing temperatures but also helps to clear out any residual water that could freeze in trapped areas. It's important to use RV-specific antifreeze, which is non-toxic, to ensure safety if any of it were to accidentally remain in the system. In contrast, the other systems listed do not require antifreeze for winterization. The electrical system involves wiring and components that are not susceptible to freezing in the same way plumbing is. The heating and cooling systems may have their own specific winterization procedures, but they don't typically involve antifreeze in the same manner as plumbing systems do.