Q: Looks like just one O'ring, is that correct? Can this be used on a brew kettle, meaning can it take the heat from a propane burner? There's a lot of heat that comes from under and travels up the side so I think it would be exposed to a lot of heat.
A: this would use a single gasket and can be used for a brew kettle conversion. We use these often in our for weldless kettle conversions without isses