If outside, piping shall be installed under the vehicle and positioned where?

The correct positioning of outside piping under the vehicle is crucial for safety and functionality. Installing the piping below any insulation is important to prevent heat from affecting the integrity and performance of the pipe. Insulation can trap heat, which may lead to increased pressure within the propane system, potentially causing leaks or ruptures due to overheating. Furthermore, by placing the piping below insulation, it allows for better thermal regulation and ensures that the piping remains within safe temperature ranges, which is vital for both the safety of the propane system and the vehicle's operation.

Choosing this position also aids in protecting the piping from environmental factors and physical damage, as it is less likely to be impacted by road debris or other hazards. Having insulation above the pipe can provide an extra layer of protection from extreme weather conditions, such as cold temperatures that could cause propane to condense. Thus, the selection of this installation method is aligned with safety standards and best practices in the handling of propane systems.