What materials are approved for joining single wall vent connectors?

The use of sheet metal screws for joining single wall vent connectors is recognized as a suitable method because they provide a secure mechanical connection that can withstand the thermal expansion and contraction experienced in venting systems. This method allows for easy disassembly if necessary for maintenance or repairs, which is a significant consideration in gas appliance installation and safety.

Using mechanical fasteners like sheet metal screws ensures that connections can maintain their integrity over time, minimizing the risk of leaks in the venting system. Additionally, the code requirements for vent connections emphasize the importance of using approved methods to ensure the reliability and safety of gas venting systems.

Other methods of joining vent connectors, such as welding or soldering, while effective in some applications, are generally not recommended for single wall connectors due to potential issues with heat transfer and the inability to easily disassemble the joints for repairs. Adhesives like glue or tape do not provide reliable mechanical strength or thermal resistance needed in gas venting applications, thereby making such options unsafe and non-compliant with industry standards.