In the bathroom one of the double sinks has sewer smell coming from under the cabinet in the area of the inline vent. Took that vent off and put on one from the kitchen vent. Still smells.

The drain runs just fine. Have gone up on the roof and sprayed with the hose, water into the vent. No other sink inline vent has that smell.

Ideas?

Try this. Remove the AAV and plug off the opening with wet rags, Give it a while and fill and drain the bowl. Does it still smell down there? Let me know, Tom