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Old 06-28-2015, 10:09 PM   #1
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black tank issue

We have been getting a very pungent sewer odor throughout the fiver, even in the basement. P traps are wet so it's not dry p traps. We use the geo method religiously and have a black tank flush that we use every time we dump. We leave water in the black tank at all times. DH looked down through the roof vents with a flashlight and all looks good. We did not have this issue last year (purchased last July). We did have a new toilet installed by the factory over the winter. Any ideas where it could be coming from? It is strongest in the bathroom which in my floor plan is just as you come up the steps going to the front bedroom.
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Old 06-28-2015, 10:14 PM   #2
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We will get odor if I am running the bathroom fan and do an extended flush to clear things.

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Old 06-28-2015, 10:18 PM   #3
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I know about the fan thing. It's not the fan. It actually permeates the whole trailer. We had to keep airing the trailer out on our last trip. We filled the tank, dumped it and flushed it again, reset with several gallons of water, my geo chemicals (liquid calgon and liquid tide) and added a little bleach this time. It helped for a short while (less than a day).
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Old 06-28-2015, 10:20 PM   #4
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I know you said p traps were good but sure it could not be the gray tanks getting funky. Other thing I would say... No dead mice in a back closet or drawer?

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Old 06-28-2015, 10:23 PM   #5
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If it is the grey tank getting funky, should I just treat it with geo method too? I have 2 grey tanks so anything is possible.
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Old 06-28-2015, 10:32 PM   #6
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One of my fellow XLR buddy's new trailer was missing a piece of vent pipe and studor valve. I have known of studor valves going bad... staying open and letting in sewer gases. They are many times under the bathroom or kitchen sink and are the way to go for island sinks, but manufacturers are many times installing them when they could have vented it to the roof.
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Old 06-28-2015, 10:33 PM   #7
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Not sure about the geo method in the gray tanks. But I think with all the soap in then naturally from shower and dish water it would not be as effective as the black. Try the bleach though. Could the smell be the Water itself smelling. See the thread on hot water suffer smell going on now.

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Old 06-28-2015, 10:49 PM   #8
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It's not the fresh/city water supply.
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Old 06-28-2015, 10:54 PM   #9
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If it is not the wager, not the traps, not a dead thing.. I'm sure someone else might have a suggestion but I am running out. Last thing I got is either the seal is bad on the toilet and flange but if it is even in the basement is a pipe broken / hairline cracked from a winter freeze?

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Old 06-28-2015, 10:59 PM   #10
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The rubber seal under the toilet is cheap, I'd start there.
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