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Old 06-21-2015, 02:17 PM   #1
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Odor from Sink on Bambi 16J

When we have the roof vent fan running, a sewer smell gets sucked from our sink drain. Because we have a Bambi 16 with only a black tank, the drain goes there. I thought there would be a trap of some sort. We can eliminate the smell by keeping the strainer closed and putting an inch of water on top. Any ideas or is this part of the "one tank" experience?

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Old 06-21-2015, 03:17 PM   #2
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Always keep a little water in the toilet to stop odors.

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Old 06-21-2015, 04:00 PM   #3
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Check the Geo Method out. I have been testing it in both my black and gray tanks for about a month, so far so good.

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Old 06-21-2015, 07:21 PM   #4
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A different sink trap can also work past both the above good suggestions. I do them both. But a HEPVO waste drain may be the "answer" you are looking for.
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Old 06-22-2015, 07:00 AM   #5
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Odor from Sink on Bambi 16J

I have a 16' Bambi, however, have not experienced the odor problem you have mentioned. Reading the post with the Google link (Geo Method) sounds like a good suggestion. Perhaps a good prevention measure for me to use occasionally in cleaning the tank. If you try the method mention in the Google link please let us know how it worked for you. Wishing you the best of luck.

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Old 06-22-2015, 07:31 AM   #6
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Are you opening a window when running the vent? The vent has to pull air from somewhere...
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Old 06-22-2015, 08:38 PM   #7
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Originally Posted by overlander63 View Post
Are you opening a window when running the vent? The vent has to pull air from somewhere...
Yes, we have the windows open but still get the odor.

Thanks for the suggestions, everyone!
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Old 06-23-2015, 10:28 AM   #8
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Check out the plumbing under the sink. First make sure the "p-trap" is in place and not leaking. Second, there is likely an "air admittance valve" between the p-trap and the tank and that valve may be stuck open allowing the tank to vent back into the trailer.

Plumbing codes require an air admittance valve in the drain line after the p-trap. This, in theory, allows air into the line when there is a negative pressure and allows the sink to drain quickly. I had one on the bathroom sink in our 2010 model that was stuck open and it allowed sewer gas back into the bathroom from the blackwater tank. I bought a new valve at a big box store but also got a 1 1/4" plastic plug at the same time. I opted to replace the malfunctioning valve with the plug and not the new valve to see how it would work. My sink works/drains fine and I no longer have a valve that can fail.
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Old 06-24-2015, 04:20 PM   #9
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The GEO method promoter is dishonest when he suggests to LIE to park operators as to what chemicals are in your tanks. This is because the suggestion to dump a half-gallon of bleach into your black tank to kill bacteria.... will also KILL THE SEPTIC SYSTEM of the park.... and THAT is why they want to know what you've dumped into your tanks!

When you kill the septic system of the park.... you do all the rest of us a dis-favor...because you will convince park operators to stop allowing dumps.

If you use the GEO method.... for goodness sakes MEASURE the amount of bleach you use to disinfect your tanks. DO NOT overuse bleach. (And be aware that bleach, when combined with acidic compounds like the vinegar in your salad dressings, etc., will release CHLORINE GAS...which will poison you like a WW-1 soldier!

The other suggestions of water softener and detergent is unlikely to be harmful but his measurements/concentrations are quite excessive for the purpose. Follow mfr's recommendations for those products.

Hope this helps.

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