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Old 03-14-2015, 09:43 AM   #15
Junior Member
Join Date: Oct 2014
Location: Golden CO.
Posts: 7
Odor in bathroom

We have a 2006 Travel Supreme and my wife and know about the odors. Months go by without the odors and then you need a gas mask. i have been a tech (car & truck) for over 40 years so I try and solve all of our own problems. Here is what I found out on our rig. Never be cheap on putting in the thetford chemical into your tanks. I use the powered, but stir it up first in toilet and sink before exiting. Next, go under your cabinet sink and smell there when its strong. If the odor is stronger there, Unscrew the top vent valve on top of black drainage pipe to remove, turn upside down under faucet and it probadly will leak (drip) pass the rubber seal. I found out that if you clean this valve at times it keeps the odors from the gray tank from coming up. we found out on some days when it gets a little windy its even worse. I always put a half bag of thetford into gray tank.

Sandy & Ted
Golden co.
In Yuma Az.

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Old 03-15-2015, 10:54 AM   #16
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Country Coach Owners Club
Join Date: Jan 2006
Location: Sacramento Area
Posts: 3,233
If you have a clothes washer on board, it may need to be run through a rinse cycle to fill its P trap.

1995 CC Magna #5280
C8.3L 300hp Cummins, 31,000lbs
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Old 03-15-2015, 04:43 PM   #17
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Join Date: Apr 2014
Posts: 226
Try getting on the roof and cleaning out both vent lines with an auger mine were clogged with either wasp nest or dirt dauber's also found disconnected vent line between black tank and roof.

Ed & Kathleen
2003 Tiffin Allegro 40'
Jeep Liberty Tow
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