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Old 03-31-2016, 09:11 AM   #1
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FBTS 1/2 bath sewer odor

We have a 2015 FBTS and have a problem with sewer odor in the half bath. I can not find on the forum if someone else is having the same problem, so here goes. We have Maxx Air covers over the bathroom vent. We rinse the tank a bunch. We put water and chemicals in the tank after it is dumped. We only use the exhaust fan after our business is done. The bathroom vent stays closed until the fan is turned on. Our dealer says they have checked everything and it is ok. The solution they have come up with is the tank vent is too close to the vent and is pulling odor back in. Does anybody else have this problem and what did you find? Thanks for the help.
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Old 03-31-2016, 10:09 AM   #2
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Try replacing the AAV. I had the same issue on an SOB 5th wheel. It was bad from the factory. It's under the sink. Every time someone took a shower it smelled horrible. Replaced the AAV with one of theses and the smell never came back.
Sure-Vent 1-1/2 in. x 2 in. PVC Air Admittance Valve-39016 - The Home Depot
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Old 03-31-2016, 11:12 AM   #3
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That was one of the things that's the tech at Jayco suggested. The dealer says that is not the problem. I have another call in to Jayco to try and make the dealer replace it. I am getting upset with my dealer. The trailer has been there since Nov6. We went over a couple of weeks ago when they told us it was done , only to find that several things had not been completed yet. Not happy
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Old 03-31-2016, 07:16 PM   #4
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Could be a bad or poorly set toilet seal, allowing the black tank smell to slip by.
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Old 04-01-2016, 11:58 AM   #5
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I'm having similar issues and my problem I'm thinking is a small leak around the seal. I have a small chip in the porcelain just above the seal and water seeps out slowly. I'm still under warranty and going to see if i can get the toilet replaced.
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Old 04-01-2016, 12:33 PM   #6
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Quote:
Originally Posted by SmokerBill View Post
Could be a bad or poorly set toilet seal, allowing the black tank smell to slip by.
If you toilet is not holding water, then it probably is a bad seal.
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Old 04-01-2016, 09:11 PM   #7
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If you toilet is not holding water, then it probably is a bad seal.
I think he may be referring to the floor seal that the toilet sits on, not the ball/blade seal in the toilet.
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Old 04-02-2016, 05:56 PM   #8
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Quote:
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I think he may be referring to the floor seal that the toilet sits on, not the ball/blade seal in the toilet.
Yep, the flange seal, not the bowl seal.
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Old 04-04-2016, 01:26 PM   #9
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More news form the dealer. Now they are telling me that the vent pipe going through the roof is too close to the Maxx air vent covers. This is allowing the odor to go up the vent pipe, in the Maxx air cover and down the bathroom ceiling vent. That doesn't seem right to me since we normally leave the bathroom vent closed. I am trying to persuade Jayco to have the dealer replace the AAV under the sink and remove the toilet and inspect the seal under the bowl.
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Old 04-04-2016, 01:36 PM   #10
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Tell them to pressurize the system with 5 lbs of air and find the leak.
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