Should flue and connector pipes be galvanized?

Flue and connector pipes should not be galvanized due to the potential for corrosion and the release of harmful substances. Galvanized pipes are coated with zinc to prevent rust; however, when these pipes are exposed to high temperatures, like those in a flue system, the zinc can evaporate and create flue gases that may be harmful to health.

In addition, the heat and acid condensation present in venting systems can accelerate the deterioration of zinc-coated surfaces. Therefore, materials specifically designed to resist high temperatures and corrosive gases, such as stainless steel or other appropriate metals, are preferred for flue and connector applications. This ensures the safety and longevity of the venting system, allowing for proper exhaust of combustion gases without risk of failure or contamination.