A 6" single wall vent connector must be made from which gauge galvanized metal?

A 6" single wall vent connector must be made from 24-gauge galvanized metal because this gauge thickness provides the necessary strength and durability for the safe venting of gas appliances. The 24-gauge metal is also optimal in terms of weight and ease of installation while still maintaining adequate resistance to the heat and corrosive by-products produced during combustion.

In addition, using 24-gauge metal helps ensure that the vent connector complies with safety regulations and standards, as it is less likely to deform under normal operating conditions compared to thinner gauges. For venting applications, it's crucial that the materials used can withstand the temperatures and pressures they encounter to prevent failures that could lead to hazardous situations.

On the other hand, thicker gauges, such as 16-gauge, may be overkill for this application, and while thinner gauges like 20-gauge, 24-gauge, or 28-gauge may be appropriate in some instances, they do not offer the right balance of durability and structural integrity for a 6" vent connector. Using a 28-gauge would compromise the vent's strength and safety, making 24-gauge the most suitable option.