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Old 07-09-2013, 05:36 PM   #1
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Dometic model 300 odor problem and replacement

Even after lots of chemical in tanks, our bath smells like the tank is opened up to the room. Seems strongest odor is near toilet. Seal is good. It holds water for days. There is no obvious leaking or loose connections. No mold, mildew, stains anywhere including under sink.

I think problem is with toilet but have no idea of what it might be. Any thoughts?

Thanks
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Old 07-09-2013, 05:47 PM   #2
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You should check the black tank vent line. If it's clear, you shouldn't have any odors. The vent outlet is on the roof.

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Old 07-09-2013, 06:07 PM   #3
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You know not to be running your create-a-breeze fan when flushing, right?
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Old 07-09-2013, 06:10 PM   #4
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Hmmmm....if the vent is clear or not clear, how are the odors getting into the bathroom?

How can I check vent to be sure its clear?

We don't use the fan at all.
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Old 07-09-2013, 09:43 PM   #5
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Originally Posted by tperk100 View Post
Even after lots of chemical in tanks, our bath smells like the tank is opened up to the room. Seems strongest odor is near toilet. Seal is good. It holds water for days. There is no obvious leaking or loose connections. No mold, mildew, stains anywhere including under sink.

I think problem is with toilet but have no idea of what it might be. Any thoughts?

Thanks
We had a similar experience with our brand new 27BESS last month. Four days into our first camping trip, there was a foul odor in the bathroom. The odor was not coming from the black tank and the fan was off. In desperation, I removed the toilet. There was a problem with the flush valve that allowed the nasty stuff to build up under the bowl. Dometic sent a replacement to the campground via next day air.
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Old 07-09-2013, 09:49 PM   #6
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We had a similar experience with our brand new 27BESS last month. Four days into our first camping trip, there was a foul odor in the bathroom. The odor was not coming from the black tank and the fan was off. In desperation, I removed the toilet. There was a problem with the flush valve that allowed the nasty stuff to build up under the bowl. Dometic sent a replacement to the campground via next day air.
Veddy Intresting.........Rockwood warranty rep told me today of same exact problem he has seen with two Dometic toilets lately. Mine is Model 300. What is yours, and who did you speak with at Dometic? Dometic referred me to the toilet manufacturer.
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Old 07-09-2013, 09:52 PM   #7
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Mine was a model 300 also. Diane at Dometic sent us the upgraded model 310 which is partially porcelain. It is more stable that the 300 which is 100% plastic.
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Old 07-09-2013, 09:52 PM   #8
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Check the vent on the roof...there'll be one for the gray and one for the black tank. They look like this...

The cap is removable and your nose should be able to tell you which is which. You should be able to see if they're clear with a flashlight or something like a length of 14/2 wire.

If the smell is from around the toilet it could be the seal at the flange.

Dave
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Old 07-09-2013, 10:01 PM   #9
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Mine was a model 300 also. Diane at Dometic sent us the upgraded model 310 which is partially porcelain. It is more stable that the 300 which is 100% plastic.
TS, I sent you a PM, but in case you do not get it, can you give me the phone number to reach Diane? Dometic customer service number is totally automated and only refers one to a service center.

Thanks
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Old 07-09-2013, 10:10 PM   #10
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We had an odor problem until we switched what we were doing. Instead of chemicals that did nothing, we switched to the geo method. We also got a tank wand and began flushing tank every trip (use a clear elbow and repeat rinse until what comes out is completely clear).

Are you putting enough water in it to not build the dreaded stone mountain (poop pyramid)? always have a few gallons in the black tank. Following all of ths our odors have been gone or a year.
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