Gray Tank Smell Issue
I have a 4 month old 2021 Cougar RDS. Only one problem to date, and I really can't figure it out.
We have two gray tanks, one for the kitchen and one for the bathroom. I typically leave the valves CLOSED, and only open to drain into the sewer connection every couple of days. Sometimes - but not always - after a day or two, a smell emanates from under the bathroom sink, the sink drain, and the shower drain that frankly would knock a buzzard off a manure wagon. I put chemicals in all 3 tanks, but it doesn't seem to stop it. And the only water in that tank is from the shower and the sink. We have to keep a stopper in the sink and put something to block the shower drain.
I would think we have a stuck vent valve, except for the fact that there is nothing going down those drains that should create this smell.
Anybody got any ideas?
Thanks in advance.
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2021 Cougar 25RDS
2021 Ford F-150 Platinum
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