Joined Vents

I know that the smaller appliance vent connector should be above the larger appliance vent. In this case, they both join together at the flue. What are your thoughts?

My thoughts; is the thing venting properly?

Performance is the ultimate test.

You know it’s wrong, so write it up as wrong.

Tests for performance to ensure it’s not a safety concern from back drafting etc.

This addresses the severity criteria of the issue.

Good response - thanks David.