Review on 🔧 Studor Redi-Vent 20346 Air Admittance Valve with PVC Adapter, 1.5-2" Connection by Chad Fox

I had a bird smell from the closet under the sink in my RV bathroom. All the information I found on the internet was about treating the tank with waste water treatment products. Others have suggested it could be a blocked vent. I removed the urine trap to see if there were any smelly things hiding. When I removed the urine trap, I noticed a vent hidden behind the sink. What is that? I unscrewed the 1.5" device and found that it once had a one-way valve. That valve was shot through. So I'm going down the rabbit hole. This may or may not be your answer. I don't want to spoil your fun down the rabbit hole. So stumble, my friend.