Flue Pipe

The flue pipe in these pics appear to be connected backwards. Is this okay?

Nope. CO leakage at joint

If it’s on a type 1 appliance (negative vent) it doesn’t matter.

At least yours is connected. Take a look at this one from a couple of days ago. :shock:

Good catch.
Recommend at least sealing it but on the bright side they will not see condensation streaks at the connection.