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Old 07-13-2012, 03:17 PM   #1
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Sewer Gas Smell

Every once in awhile I get a sewer gas smell in my RV. I bought Cyclone Sewer Vents for both roof vents from Camping World. I question if they work or not as sometimes I still get the smell in the RV. Any other ideas to stop this?
I have a 2006 Traillight on a Workhorse chasis.
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Old 07-13-2012, 05:22 PM   #2
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Quote:
Originally Posted by Cacti View Post
Any other ideas to stop this?
I expect to develop an article about this very same challenge over the weekend. Stay tuned.
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Old 07-13-2012, 07:18 PM   #3
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Cacti,

I had very similar problem with my '05 Bounder. Every once in a while there would be a sour smell when you first walked in. I replaced the "in-line vents" in the water drain pipes. They were located under the each sink and the wasing machine drain. There are readly available at Home Depot or Lowes for about $6 each. Also in mine the gas alarm would go off intermittently. Since then, no more smell or alarms....

Later,
Francis
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Old 07-14-2012, 08:21 AM   #4
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sewer gas smell

Thanks for the feed back.
Driver looking forward to your input on this.
Canyon453, a couple of questions on the in line vent.
1. Is there already an exsisting vent and this one will replace it or is this vent someting new to be added to the line?
2. If this is to be added as new which pipe gets cut and add the new vent?
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Old 07-14-2012, 08:52 AM   #5
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Make sure you do not have a small propane leak like a stove pilot being on and not lite. Often the mecaptha is mistaken fro sewer. Some times a wwet cell battery going bad is also mistaken fro sew smell.

Ken
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Old 07-14-2012, 09:25 AM   #6
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Quote:
Originally Posted by Cacti View Post
Thanks for the feed back.
Driver looking forward to your input on this.
Canyon453, a couple of questions on the in line vent.
1. Is there already an exsisting vent and this one will replace it or is this vent someting new to be added to the line?
2. If this is to be added as new which pipe gets cut and add the new vent?
The factory installs them. They are called air admittance valves or vacuum breakers. They open when you dump the gray water so the vacuum created as the water flows out doesn't suck the water out of the trap. They unscrew by hand easily . This is a picture of what they look like. It's the black cylinder on the right side with the water supply line in front of it.
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Old 07-14-2012, 12:31 PM   #7
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Quote:
Originally Posted by Cacti View Post
Thanks for the feed back. Driver looking forward to your input on this.
We just finished up the install and photo shoot. The rest of the story should be done and up by tomorrow.
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Old 07-14-2012, 12:57 PM   #8
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Cacti,

As Clay said, they are installed at the factory. They are a mechanical device so they do go bad. They are suppose to let air into the drain pipe but not let air/sewer gases out. Hope that's all it is.

Later,
Francis
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Old 07-14-2012, 01:01 PM   #9
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Hope it's just the vents. I had a smell I thought was the gray tank, but after replacing the little vents under the sink it didn't go away. I spent a lot of time on getting the gray tank flushed and cleaned. Then I noticed I only smelled it when I was on shore power. Also, my propane detactor would go off once in awhile. Someone steered me to my batteries and this turned out to be the problem. I hooked up to shore power at home and waited awhile and sure enough the smell was in the MH. I went outside and could really smell it by the battery compartment. Popped it open and started feeling batteries, finally found one of the chassis batteries a lot warmer then all the others. Bad cell, replaced both of them and no smell anymore. Also, the propane detector is now working just fine. Good luck, hope you find it soon.
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Old 07-14-2012, 01:23 PM   #10
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Propane is essence of SKUNK

Batteries give of sulfur dioxide (Rotten egg)

Sewer gas is mostly methane which has little odor but there are other esters in the mix which .. Well STINK

I find on my coach if I dump the tanks and close the valves, no stink,

If I dump and leave 'em open, Big Stink.
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Old 07-14-2012, 01:47 PM   #11
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Quote:
Originally Posted by Clay L View Post
The factory installs them. They are called air admittance valves or vacuum breakers. They open when you dump the gray water so the vacuum created as the water flows out doesn't suck the water out of the trap. They unscrew by hand easily . This is a picture of what they look like. It's the black cylinder on the right side with the water supply line in front of it.
And can be purchased at big box stores for a reasonable fee. Usually go on hand tight and snugged up with an extra grunt or two. No glue please.

http://www.lowes.com/pd_24372-143-85539K_0__?productId=1069119&Ntt=plumbing+vents&pl =1&currentURL=%2Fpl__0__s%3FNtt%3Dplumbing%2Bvents &facetInfo=
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Old 07-14-2012, 02:55 PM   #12
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Another source could be the sewer line for a washer/dryer. We have the hookup for a washer, but no washer. The drain pipe has a trap in it. If it is unused sewer gas can enter the MH that way. I put some pink antifreeze in mine and put a cap on the pipe.
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Old 07-14-2012, 09:45 PM   #13
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Hey guys I just finished up my latest Blog entry ... I hope you like it.

Installing the 360 RV Universal Holding Tank Roof Vent Siphon Cap

The new siphon cap places a significant negative pressure in the stack, while in motion or not, causing the evacuation of holding tank orors without any moving parts.

At about $30.00, it less than half the price of other solutions.
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Old 07-15-2012, 03:18 PM   #14
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sewer gas smell

Thanks for all the info. I will have to go to a big box store and pick up a couple.
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