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Old 08-27-2013, 11:19 PM   #1
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What's that smell ????

Need some help, have the Rockwood 8289ws, 2013 model. Walked in camper after it was setting in long-term site for 10 days and have a terrible smell around the kitchen Island. Smells like the galley tank is venting into rv. Any suggestions ?
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Old 08-27-2013, 11:28 PM   #2
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Assuming there aren't any food scraps anywhere in the area you mention causing the smell, and if it is from the gray/galley tank...........can you confirm there IS standing water in the "P" trap of the kitchen sink? This is supposed to have water in it all the time to stop the very smells you indicate you have.
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Old 08-28-2013, 12:13 AM   #3
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A friend of mine checked his after finding a strong smell by one of the sinks and found that the air admittance valve (yes I had to google the name of it) had failed and was leaking.. He capped it off, temporarily, and the smell was gone..
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Old 08-28-2013, 10:37 AM   #4
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A friend of mine checked his after finding a strong smell by one of the sinks and found that the air admittance valve (yes I had to google the name of it) had failed and was leaking.. He capped it off, temporarily, and the smell was gone..
I think that's my problem. I had to Google that also and there is one under the counter top. I tightened it down and that seemed to help. It was loose, not sure if it was supposed to be or not. Can't say I know how it works exactly.
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Old 08-28-2013, 10:44 AM   #5
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Same problem...

Old smelly dish rag under sink...
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Old 08-28-2013, 11:07 AM   #6
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Same problem...

Old smelly dish rag under sink...
I wish it were that simple, easy fix.
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Old 08-28-2013, 11:10 AM   #7
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Any plumbers out there care to explain how the air admittance valve works, should it be tightened down, why is it needed ??
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Old 08-28-2013, 11:37 AM   #8
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I wish it were that simple, easy fix.
Not so easy as it took a lot of investigation to find it.
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Old 08-28-2013, 11:47 AM   #9
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When you dump a tank a vacuum is formed and that vacuum must be relieved to prevent the tank from collapsing and for a complete drain. The vents I have seen have a rubber diaphragm that opens when it senses the tank has a vacuum and closes when there is no more vacuum.

Could be that there is something under the flap and prevents it from sealing properly or the flap is torn. You might try spraying silicone on and under the flap. That may make it more pliable.
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Old 08-28-2013, 11:53 AM   #10
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Any plumbers out there care to explain how the air admittance valve works, should it be tightened down, why is it needed ??
Not a plumber, but in your house you have a vent stack (pipe) that goes up through the roof to allow air into the sewer pipes when you flush the toilet or use the sink.

This allows water in the P-trap to stay there and not be sucked out by the vacuum created when another sink or toilet is sending water into the sewer. Without a way for air to get in, the pipes will try to get it from what ever is easiest and it will suck water out of the closest trap to get it.

In the camper there is only one gray water vent (normally), so they install a rubber sealed check valve that prevents water from coming out of the valve, but when there is a suction on the sink, lets air (easier to move than water) into the pipes.

When not in use, the rubber seal keeps putrid gases from the gray water tank from leaking into the camper. If the seal gets hard (heat is the usual suspect), it will not close properly and allow those smells into the camper.

Replacing the valve is easy as the just unscrew; put Teflon tape on the new one and screw it right in.

Auto vents and automatic home sewer vents from FAMOUS PLUMBING SUPPLY
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