What do you guys make of this vent connection at the chimney?
Not allowed here Local AHJ rules no flex.
Looks like it might be a Z-Flex liner:
That looks like it. Thanks. I told my client you guys would get back to me quick!
You might wan to check that .PDF - I know you need a listed connnctor if to B-Vent, I don’t know about single wall, though.