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Old 11-24-2011, 08:07 PM   #1
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Sewer odors

Today I fixed the sewer odor problem in my 2000 Tradewinds. We just bought this MH in October, but it had real problems with odors. After researching and read threads on this and other forums, I realized that the problem most likely was the toilet seal. The new seals came in yesterday and I replaced them today. What a disgusting job! Worse than any house toilet I've repaired. First thing I found was that the clamp was not torqued to 65 in/lbs. It was almost loose. The seals were gross!. Anyway, after I cleaned everything up, installed the new seals, and torqued the clamp to 65 in/lbs, the toilet holds fluids. I think the problem is fixed. I sure appreciate all of the knowledge and insights I gained from this forum. Didn't make the job any easier, but it helped me resolve the problem. Once the weather is better, I'll probably install a vernturi vent cap.

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Old 12-01-2011, 11:28 AM   #2
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Well, I'm glad you were able to figure it out. I have also been able to fix several problems using the combined knowledge of irv2!

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Old 12-19-2011, 11:23 PM   #3
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Black tank vent

Another source of odor I found on my 99 TW was the vent riser pipe had slid down far enough to allow fumes to get into the space between the roof and the ceiling.
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Old 12-20-2011, 12:39 AM   #4
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So far I've never had to replace a bowl seal on an RV. Now that I've said that it'll probably be the next thing I need to fix on our 9 year old MH.

On both our DSDP's we've had a black tank washout as standard equipment, as part of that there's a vacuum breaker under the bathroom sink. I've had them stick and suck odors out of the tank. One I had replaced under warranty, the last one I took apart and freed it up, spraying silicone lube on it. Put it back and it's still working fine a couple years later.
2009 45' Magna 630 w/Cummins ISX 650 HP/1950 Lbs Ft
Charter Good Sam Lifetime Member, FMCA, SKP
RV'ing since 1957, NRA Benefactor Life, towing '14 Jeep JKU Dragon Edition
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Old 12-20-2011, 03:19 PM   #5
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The note about the vacuum breakers is a good thought. We took our toy out for a drive last weekend - we don't want to let it sit too long - and we thought we could smell a little sewer odor. The toilet bowl still has fluid in it so I'll have to check the vacuum breakers the next time we run it.
Charlie & Mernie Matthews
Liberty Lake, WA
2016 Denali Fifth Wheel
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