Coast Resorts Open Roads Forum: Fifth-Wheels: new strong odor - help/advice please
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 > new strong odor - help/advice please

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weberchk

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Posted: 11/04/13 09:10am Link  |  Quote  |  Print  |  Notify Moderator

Hello. We have a three month old fifth wheel with a new issue that just started two weeks ago under the very specific following conditions (that happen to occur often). When the grey tank is more than half full, somebody is taking a shower and the grey holding tank valve is closed. A very strong odor enters the master bedroom. The smell is nasty, but hard to describe. Not really sewage, not really gas, but sort of like something in between perhaps. The smell is not detected in the bathroom or anywhere else in the unit, only in the bedroom which is next to the shower. FYI. We have two grey tanks and the one serving the shower only serves it and the bathroom sink. If I open the grey valve and drain that grey tank before the shower or leave it open or it is less than half full during the shower the odor is not detected at all. Also, the odor only fills up the bedroom during the shower and for approximately 15 minutes after the shower, then it goes away. I tried several grey tank odor cleaning priducts, but they have had no impact either. I have not detected any obvious signs if leaks either. We are new to this, but learning from experienced people like yourselves. Thank you.

enblethen

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Posted: 11/04/13 09:14am Link  |  Quote  |  Print  |  Notify Moderator

Look to see if you have a vent on the roof. You could have a vent under the sink or in a closet for venting the shower grey tank. It could have problems. If vented through roof, this is not the problem.


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wborst

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Posted: 11/04/13 09:19am Link  |  Quote  |  Print  |  Notify Moderator

Check the air admittance valve that is likely located under the bathroom sink. If this fails to close properly it will let odors from the grey tank enter the living space. This is a vry inexpensive device available from any home improvement store for $10 or less.


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lanerd

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Posted: 11/04/13 09:26am Link  |  Quote  |  Print  |  Notify Moderator

Hummm... he said the odor is only in the bedroom. If the air admittance valve under the bathroom sink were to malfunction....wouldn't the odor then be only in the bathroom?

Sounds to me like the vent tube that goes to the roof is in the wall between the shower and bedroom and has somehow separated from the tank or maybe a connector on the tube has separated and allowing odor to penetrate the bedroom wall.

Anyway, that's my best guess and where I would start looking. However, just to make sure, I would definitely check the air admittance valve just to eliminate that possibility.

Ron


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jrwhited

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Posted: 11/04/13 09:36am Link  |  Quote  |  Print  |  Notify Moderator

I agree with ron. your vent tube seems to have separated in the wall

skipnchar

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Posted: 11/04/13 09:37am Link  |  Quote  |  Print  |  Notify Moderator

Others are likely correct but as Ann alternative: check your battery. Feel the sides to see if it is hot or quite warm. Internal short will cause off gassing a sulfur dioxide gas. If it's hot get it disconnected and take it for testing at most any auto parts store or battery retailer. It's possible for them to explode if left in service and there is a short.


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Old-Biscuit

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Posted: 11/04/13 09:38am Link  |  Quote  |  Print  |  Notify Moderator

Would be nice to know which 5'vr........

BUT sink could be in bedroom with a potty room with just toilet.
Could have a washer/dryer prep in wardrobe closet in bedroom
SO......
Could be an 'air admittance valve' under bathroom sink that is allowing odors from grey tank back into rv
Could be an empty 'P' trap on washer drain line allowing grey tank odors back into rv
Could be a crack in grey tank vent line that goes up thru closet/wall in bedroom to roof

What is strange is that it smells when grey tank gets 1/2 full???
That suggest vent line is getting blocked/plugged and not venting tank properly so the odors come out somewhere else.


Is it time for your medication or mine?


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weberchk

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Posted: 11/04/13 09:47am Link  |  Quote  |  Print  |  Notify Moderator

Thank you for many replies. The smell is hard to describe, but does resemble sulfur smell we smelled at hot springs once. Would a grey tank have sulfur smell as well? Related to hot water used for a shower? Interesting thought also about "batter". What is this? Thank you!

calamus

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Posted: 11/04/13 09:48am Link  |  Quote  |  Print  |  Notify Moderator

our auto vent under the sink had rattled loose. I had the same smell in our whole camper. I think that may have fixed it but we are at the end of camping season here so I will know more next year. The auto vents are about $4 at hardware stores.


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reddwar

Valley Center Ks. /Now Scotland SD.

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Posted: 11/04/13 09:50am Link  |  Quote  |  Print  |  Notify Moderator

Sounds like a vent pipe to me also. You say it is new take it back to the dealer & have them take care of it. I work on mine now that it is three years old but when new I let HH take care of the problems.

red

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