How steep should a vent connector slope upward toward the vent or chimney?

A vent connector should slope upward toward the vent or chimney at a rate of 1/4 inch per foot. This specific slope is important because it ensures that condensate can effectively drain back towards the appliance rather than accumulating in the vent connector itself. If the slope is too shallow, it could lead to moisture buildup, which may cause corrosion or blockage within the venting system. Conversely, a steeper slope might cause other issues, like increased turbulence that could affect the flow of combustion gases. Therefore, maintaining a 1/4 inch per foot slope strikes an effective balance between proper drainage and ensuring optimal venting performance.