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Old 10-02-2007, 08:44 PM   #15
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Well, we took the Bambi to Oasis RV Venter in Tucson yesterday to figure out where the foul odor is coming from...we shall see...they replaced the vacuum break vent cap under the vanity and felt that is where the odor is originating, it perhaps Michelle was right...I sure hope so. They said they checked the other seals and everything else looked good. I hate dragging the Bambi back and forth to the AS place and all that...I just want it FIXED!

Thanks for all your input! I'll keep you posted...

TB
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Old 10-02-2007, 09:33 PM   #16
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Gray water tank

A friend of mine was experiencing a terrible odor that became more pronounced when the exhaust fan in his SOB was turned on. He uses the same Odorlos chemical I use but I found out he never treated his gray water tank, only the blackwater tank. A liberal dose in the gray water tank and a day later it was much better. He even had an orange algae inside the gray water tank.
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Old 10-02-2007, 09:53 PM   #17
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I am coming in on this a little late but I thing that you may be experiencing what we had which is the drain vents were bad and it smelled like sewer gas or propane all the time under the sinks.
I forget what the technical name for these vents are but they are screwed in the drain pipe just after the p-trap and allow air to enter the drain piping when water is draining down the pipe. This prevents the p-trap from getting sucked down. As you know - there has to be water in the p-trap to keep sewer gas from venting back up through the sink.
Anyway - we had bad sewer smells in our kitchen and I replaced the drain vents and no more problems with that.
the attached picture is the view from under my sink. The arrow points at the vent.
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Old 10-03-2007, 12:08 AM   #18
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Quote:
Originally Posted by TBRich
as far as I know there are 4 openings into the black tank that could have a seal that is not sealed (Correct me if I'm wrong!):

1. the toilet seal itself
2. where the vent pipe connects to the black tank (right behind the toilet)...
3. where the factory sprayer is attached (which is near tthe top of the tank and also near the point where the vent pipe is connected...but on the upper side of the tank...
4. the dump connection...the latter would most likely not be an odor source I am thinking...at least not into the interior...TB
the 5th 'opening' in the black tank is for the tank sensor, but not likely to be the source of THIS odor...

the one/way vacuum break/valve IN the black tank flush piping can leak/fail...

it's not IF but when...

as using the btf much will eventually lead to failure.

good luck with the fix.

cheers
2air'
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Old 10-03-2007, 08:50 PM   #19
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Quote:
Originally Posted by 2airishuman
the one/way vacuum break/valve IN the black tank flush piping can leak/fail...

it's not IF but when...

as using the btf much will eventually lead to failure.

good luck with the fix.

cheers
2air'
Thanks, 2air'...I'll check that...is the valve located in theine between the input and where it is is attached to the tank, or somewhere in the line before the tank?

We are going out again this weekend and hope it's better!

Thanks,
TB
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Old 10-04-2007, 12:33 AM   #20
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hi tb'

the valve/breaker for the btf is actually inside the lower bathroom cabinet...

behind the sink trap...

there may be a picture of it in your owners manual...

it is a real challenge to replace because of the tight location.

cheers
2air'
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Old 10-09-2007, 11:33 AM   #21
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Smile Is the smell gone?

Quote:
Originally Posted by TBRich
they replaced the vacuum break vent cap under the vanity and felt that is where the odor is originating, it perhaps Michelle was right...I sure hope so.
TB
So? So? So? was I right? Inquiring minds want to know.
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Old 10-09-2007, 10:28 PM   #22
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Not that I have any trailer experience yet, but I did stay at a Holiday Inn Express last night.... (hee hee) My folks have an attic vent fan in their house and it will pull large quantities of air through their house. They have to ensure that a door or window is open to run it or they risk drawing air through the furnace into the house. They had a hvac guy out one day and got the warning from him. I imagine a similar prinipal is at work here. It's probably causing air to come in the trailer down the vent stack. I imagine if you open the door or crack a window, the problem would go away?

Cheers,

Doug
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Old 10-09-2007, 10:32 PM   #23
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I figured out that with the fantastic fan set on exhaust I need to open a window to make it efficient. And you can hear the difference on the fan when a window is open. Doesn't have to be wide open but acrack make a big difference.
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Old 10-09-2007, 10:58 PM   #24
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yakman & duffering -- TBRich said he always opens the opposite end ceiling vent when he is running his fantastic fan.

I usually am going to have a window relaxed open at least (or more) when I run my fan. But on my 25' FB the black tank vent is exactly 16 inches from the front ceiling vent -- so I'd know what I was smelling if I didn't happen to have a window open already.
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Old 10-09-2007, 10:59 PM   #25
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my bad...
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Old 10-18-2007, 07:29 PM   #26
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Air down the vent?

I think Overlaqnder & Canoestream are on the right track. The fantastick fan is probably drawing air down the vent stack and it is leaking past the toilet which should be sealed.

Run the fan and have someone put a cigarette near your vent. If smoke goes down the vent, you know the problem....the toilet!

If putting water in the toilet seems to seal it you may also want to crack a window when running the vent.
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Old 01-08-2008, 07:32 PM   #27
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I am experiencing this same problem...............air is flowing up around the stand pipe down into the floor.............the stand pipe is connected really well............when I plug the gap up with paper towels, stopping the air flow, the odor goes away.............NO I dont want to just leave the paper towels there................What can be going on???...........a cracked tank???......thanks.......Dennis
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Old 01-08-2008, 09:23 PM   #28
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I found by cracking a side window a little, allowing for outside air to come into the unit and replace the air removed by the fan. It won't draw fumes from the tanks and smell goes away.
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