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Topic ClosedSewer smell in pod

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Danielw1 View Drop Down
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Direct Link To This Post Topic: Sewer smell in pod
    Posted: 19 Sep 2017 at 9:08am
I took my rpod hunting for a week and used the bathroom sparingly. Now it has been sitting for two weeks and has a strong sewer smell as soon as you walk in. Normally I would drain the tank on the way home but I needed to get an elk in the fridge fast. There is water in the toilet and the gasket seal is good. All other traps have water in them. I would not think after two weeks it should be this bad, I also have put like 3 of those tablets in there.
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furpod View Drop Down
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Direct Link To This Post Posted: 19 Sep 2017 at 10:37am
double check the "air admittance valve", under the kitchen sink. Often an undiagnosable smell is from there. They are just a simple spring device, and they do fail.
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TheBum View Drop Down
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Direct Link To This Post Posted: 19 Sep 2017 at 10:38am
Are you sure it's not gray tank stink? We've had that issue and my wife discovered that dumping a quart bottle of lemon juice down the drains does the trick.
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riotkayak284 View Drop Down
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Direct Link To This Post Posted: 19 Sep 2017 at 11:03am
Plus 1, on the grey tank.... I find that sucker stinks more than the black water..... 
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furpod View Drop Down
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Direct Link To This Post Posted: 19 Sep 2017 at 12:09pm
yes, grey tank odors enter through the AAV.. 
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TheBum View Drop Down
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Direct Link To This Post Posted: 19 Sep 2017 at 12:55pm
Does the AAV work on the weight of the water hitting it, i.e. the water weight causes the valve to open and once the water's gone, it springs shut (if it's working properly)?
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furpod View Drop Down
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Direct Link To This Post Posted: 19 Sep 2017 at 2:20pm
The vacuum of the water trying to go down the drain pipe opens it, and then it springs back closed. It isn't "in-line", but at the top of a small stack, under the sink.

Here is a picture of how it is put together in the pod as FR built it.. the sanitary T running to the right in this picture goes over to the "P" trap. The valve itself is at the top of the stack.



Here is a picture of how and where I moved ours for the flush cooktop mod..




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Danielw1 View Drop Down
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Direct Link To This Post Posted: 19 Sep 2017 at 10:25pm
I kept thinking that it may be the grey tank so I put water in all the drains thinking the trap was dry. I'll check that valve. Thank you
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ToolmanJohn View Drop Down
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Direct Link To This Post Posted: 20 Sep 2017 at 5:19am
+10 on all the solutions.  Early in camper ownership, I also encountered this issue. Keeping water in thr traps, but especially putting a tank chemical into the gray and black tanks, eliminates the odor. There is a sewer gas vent pipe through the roof.  So if the tank hasn't been  treated AFTER dumping, it can indeed smell.

 I mix tank chem in a large bucket, and dump about a gallon in each tank (toilet and sink) , after each trip. Never had an issue after that.
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StephenH View Drop Down
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Direct Link To This Post Posted: 20 Sep 2017 at 10:16am
Where is the odor the strongest? If it is under the kitchen sink cabinet, then that would indicate the AAV might be the problem. While you are under there, check the tightness of the drain fittings and look for evidence of leaks from the P trap.

If it is elsewhere, it could indicate a different problem. My parents had an RV where somehow, the vent pipe that should have gone through the roof became disconnected below the roof. I don't know for sure but is there another AAV behind the bathroom sink? Next time I go out to our 179, I will have to look and see.
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