What is the minimum slope per foot that a vent connector should have?

The minimum slope per foot that a vent connector should have is indeed 1/4 inch per foot. This slope is critical for ensuring that the condensate produced during the venting process can properly drain away from the appliance and does not accumulate in the venting system.

A slope that is too shallow may lead to water pooling within the vent connector, which can cause blockages, reduce the efficiency of the venting system, and potentially create hazardous conditions, such as the release of exhaust gases back into the living space due to improper venting.

In contrast, steeper slopes, such as 1/2 inch per foot or 3/4 inch per foot, are unnecessary and could complicate installation or affect how the vent system functions. While a slight slope is beneficial, the established standard of 1/4 inch per foot is specifically designed to provide adequate drainage without overcomplicating the installation or leading to potential operational issues.