Jimdamedic
Well-known member
- Joined
- Jul 22, 2015
- Posts
- 157
We have a persistent problem with sewer gas in our Cougar 5th wheel. We’ve flushed the tank and I’ve even run a camera into it and there’s no retention. It’s been flushed. We have used the packets that dissolve debris. We use deodorizer and cleaner. The issue only happens when the tank is over half full or so. Once it’s emptied it goes away completely. I can’t see any issues with the vent on the ceiling but I don’t know how to check it. The only issue That I can find is a very slow leak in the black tank valve. After a few days a couple of cups will accumulate behind the gate valve I’ve put on the hookup. Any ideas?