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Old 07-12-2019, 08:05 PM   #1
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Toilet/black tank question

Hi Sunliners,

I'm wondering if my vent for the black tank might be clogged. There is an odor when I flush. Sometimes from the toilet itself. Sometimes seems like it's coming from under the camper.

I have been good about keeping happy camper in the tank and regularly flushing it with fresh water.

Sound like the vent? Other ideas?

Thank you!
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Old 07-12-2019, 09:23 PM   #2
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Yes, if the black tank vent up on the roof is plugged with spider cobwebs or other insects, the tank will not vent correctly and can create a backup of gas fumes in the tank that can come up into the camper through the toilet when flushing.

Also, if you have an exhaust fan in the bathroom running when you flush the toilet, that too can draw blank tank gas fumes up the toilet when flushing even if the tank vent is clear and working. If the fan was on, just turn it off to flush, then back on. An open window with a breeze may cause the same thing.
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Old 07-14-2019, 06:27 PM   #3
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Thanks, John. I think it's worth a look down the vent. Already have new dicor tube on its way. Good wishes.
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Old 07-18-2019, 07:10 PM   #4
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One thing to remember is that the gas generated by the head, sorry old Navy type, is methane. It is flammable in certain concentrations. Just like on buildings, the stack is intended to vent this off. By all means, clean your stack.
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