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Old 08-16-2011, 01:31 AM   #1
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I have an odor of what seems to be sewer gas coming from under the sink in the rear half bath. The rear toilet is not vented outside as far as I can see. Is that a check valve at the top of a pipe behind the P-trap? I can see a spring inside of it through what appear to be vent holes.

There were some postings a while back concerning a similar issue, I think (that is dangerous, me thinking).
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Old 08-16-2011, 02:59 AM   #2
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Art ...Could be your Studor vent is bad. Look at post "odor under the sink" under Sunset Trail.



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Old 08-16-2011, 03:47 AM   #3
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I just replaced mine under the bathroom sink last weekend. It had glue in it and it would not seal properly.
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Old 08-16-2011, 04:37 AM   #4
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Thanks for the responses. I just unscrewed the "Studor" type vent. I do not know what I am looking at. I can see the spring and the rubber diaphragm at the base of the spring. How do I know if the vent is bad, aside from the odor?
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Old 08-16-2011, 08:25 AM   #5
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Clean the end of it and you should be able to suck air through it and you shouldNOT be able to blow air through it.If you can blow air at all it is bad and will letgas through.
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Old 08-16-2011, 11:51 AM   #6
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In a different brand of trailer, my brother in law took the studor cap off put aregular pvc cap back on and had no touble and the odor finally went away. Just sayin

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Old 08-16-2011, 12:33 PM   #7
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If in doubt, buy a new one - they are only a few bucks at H.D. I would not cap it as the vent is what helps the water drain from the sink.



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Old 08-16-2011, 03:34 PM   #8
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Quote:
Originally Posted by artgpo
I have an odor of what seems to be sewer gas coming from under the sink in the rear half bath. The rear toilet is not vented outside as far as I can see.


If I recall on your floor plan the half bath is next to the refrigerator. the vent pipe could be running behind the fridge and vented under the fridge vent cover on the roof. One of my grey tanks is vented that way.
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