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Old 04-30-2014, 04:29 PM   #1
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Sewer gas question for any who parks inside

I have a question for anyone who parks their Interstate in an enclosed non-ventilated space. We are working on an addition to our house that will include a fully finished (insulated and drywalled) garage space for our AI to live a pampered life indoors (and out of the Oklahoma hail!). What I am wondering about is sewer gas from the black tank vent and if that is going to stink up my garage. I'm thinking about putting a bathroom vent fan in the ceiling positioned so it will sit right over the black and grey tank vents (ceiling is 12' so it fan would sit about 2' over the vents) ... but I'm not sure if that is necessary or conversely if it will be sufficient. We use our AI as a run around town vehicle so while the tank gets dumped every couple of weeks it will definitely have odiferous contents in it while sitting parked indoors. Does anyone have any real world experience with this?
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Old 04-30-2014, 05:07 PM   #2
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I know someone on RV.net that won't use the bathroom in their B for that very reason. I can't imagine it not being an issue. I also can't imagine not using the facilities in my very expensive camper. I would look into some sort of hose arrangement like some garages use to keep down exhaust fumes. Some sort of loose fitting hose that could slip over the vent(s) and take the bad air outside.
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Old 04-30-2014, 05:10 PM   #3
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I have parked my argosy inside my heated shop all winter, but the tanks were dumped before it was put in the shop. No smell what soever. Putting a vent directly above the AS vent would be a good idea if the tanks were not dumped before storage inside.
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Old 04-30-2014, 05:10 PM   #4
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Quote:
Originally Posted by russ240 View Post
I have a question for anyone who parks their Interstate in an enclosed non-ventilated space. We are working on an addition to our house that will include a fully finished (insulated and drywalled) garage space for our AI to live a pampered life indoors (and out of the Oklahoma hail!). What I am wondering about is sewer gas from the black tank vent and if that is going to stink up my garage. I'm thinking about putting a bathroom vent fan in the ceiling positioned so it will sit right over the black and grey tank vents (ceiling is 12' so it fan would sit about 2' over the vents) ... but I'm not sure if that is necessary or conversely if it will be sufficient. We use our AI as a run around town vehicle so while the tank gets dumped every couple of weeks it will definitely have odiferous contents in it while sitting parked indoors. Does anyone have any real world experience with this?
No experience. However, no garage should be enclosed and non-ventilated, simply because you're parking an internal-combustion engine in it. Not to mention a propane tank. I'd recommend that you definitely provide ventilation for safety, even if there wasn't a black tank's stink to contend with.
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Old 04-30-2014, 05:11 PM   #5
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Well you could sanitize the black tank after a trip or you could cap the vent when it is not needed. If there is nothing in the tank then there is nothing to generate gases. If you plan on using it while inside then you would need a vent line. Something like a vacuum cleaner hose connected to a roof vent that looks like a candy cane.

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Old 04-30-2014, 05:51 PM   #6
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Speaking from experience---we have a large, enclosed, heated/conditioned garage. Been parking a Class A in there for 20+ years, now parking our Interstate. When I returned with any quantity of black and grey water and DID NOT dump tanks after a couple of days parkedwhew!!!! Worse in warm weather. So I would remember to dump tanks either at our outside location in our lower parking area. I preferred to do it outside because even with externally vented floor plumbing and a screw in 3" hose drain there was still strong odors in the garage. I use the inside connection for flushing the tanks. That did not have any strong odor problem at all. I also have ventilation in the garage both manually controlled with a timer and also a thermostat control in case of extreme heat buildup. And once tanks were emptied I always added some fresh water with some tank conditioner.
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Old 04-30-2014, 07:42 PM   #7
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I had a big class A, that I parked in the garage & now my interstate. I never noticed a smell. I do have a sewer hookup in there, so I never really leave it full of black water.
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