Redrider007
Well-known member
We have been dry camping without moving for months and even prior I have noticed a foul sewer smell when flushing. I have replaced valves under sinks and run a fish tape down my vents but can’t stop the smell. I don’t think the tank is full but it almost always reads full after dumping and flushing tank so it’s hard to tell. I’ve used a variety of black tank additives but after a couple weeks it gets bad.