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Old 07-04-2011, 04:45 PM   #1
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Stinky galley vent pipe

I have a 5th wheel rockwood 8281ss 2006
We have owned this since 2009. The galley vent pipe comes out just below the window on the door side. We always get a terrible smell whenever my wife washes dishes and we are at the table. I have rinsed several times, used every method under the sun. Is there a something im missing,cant get this under control...
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Old 07-04-2011, 05:10 PM   #2
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Quote:
Originally Posted by mcfall9 View Post
I have a 5th wheel rockwood 8281ss 2006
We have owned this since 2009. The galley vent pipe comes out just below the window on the door side. We always get a terrible smell whenever my wife washes dishes and we are at the table. I have rinsed several times, used every method under the sun. Is there a something im missing,cant get this under control...
Welcome.
Just washing out doesn't get the oil or grease out of the galley tank. You may have to find a degreaser and back flush the tank if you can and flush again.

I'm sure other may help with more suggestions.
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Old 07-05-2011, 07:21 AM   #3
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Wow, what a horrible place to put the vent!
Sheesh!! What were they thinking!
I've never heard of a vent that didn't go thru the roof......

We use gray water treatment from the RV isle at Wally World.
It's lemon scented.
Wife also uses lemon "flavor" dish detergent.
When I dump tanks the gray tank smells like a freeking lemon-aid stand.

You might give it a try.
If it's as bad as you say, you might consider making some sort of extension
that you could stick in the vent opening that would extend up the side and end above
the roof line. Something removable that you'd only use when camping and could
remove when traveling.

It's a thought.....Good luck!
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Old 07-05-2011, 07:45 AM   #4
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Your under sink galley vent is broken IMO.

It should only PULL air into the trap, never let it out. The gray tank is vented to the roof over the gray tank. The photos I found of your rig on the Internet (post here a photo of what you are calling the outside kitchen vent) show no place for a vent stack to go to the roof. In that case (like my vanity in the bathroom) my money is on a black plastic "no vent" vent being used under the cabinet. This prevents "burping" your trap under the sink when you run water into it. Burping lets gas from your gray tank enter your camper through the sink trap. Take a photo under the sink an see if the vent goes to the outside or terminates in a black plastic "cap" (the vent).
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Old 07-05-2011, 09:33 AM   #5
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No vent thingy or do hicky. No really the pvc runs from both sinks to a y fitting from there one goes up and out below my window and the other goes below the camper to the tank. I really apreciate all the feedback and help.
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Old 07-05-2011, 11:36 AM   #6
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Good Lord! Photos would help here.
What does it look like on the outside?
A hole in the wall?
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Old 07-05-2011, 05:06 PM   #7
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I have attached pics you asked for. Talked to a few dealership service techs today,got me nowhere. One told me they rerouted a few of that style behind the refrigerator then up the roof. I cant see how that was done without cutting structure out. One is vent pipe with cover removed close up, the other is a vent pic with cover removed distance pic,then cover attached . The under sink pic shows a pipe coming in from the left that is simply attached to a p trap and the two drains of both sink sides.
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Old 07-05-2011, 05:16 PM   #8
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Thanks for the input. My awning is on that side and my door is right there so I cant get anything to the top easily at all.
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Old 07-05-2011, 05:27 PM   #9
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I have the same setup. I would recomend flushing the tank really good and use a gray water treatment. I has a similar issue and once flushed and starting using treatment never happened again.
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Old 07-05-2011, 05:59 PM   #10
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Thanks, finally someone else on earth with a poorly designed rockwood sink vent !! I have rinsed that thing and let it set i dont know how many times. I always use the green stuff that smells like mint on all tanks. I use only four ounces and i use it before and after each trip. What is the brand you use. I have bleached the tank today and let it set overnight. If this does not do it I may look into rerouting under the camper up to the vanity or shower vent.
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Old 07-05-2011, 06:06 PM   #11
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I use a Lemon scent from Walmart. Can't remember the brand. Did you check to make sure their are no clogs in any of the pipes? I would not replub this vent up to the front. You want the vent higher then the trap, otherwise you would have a wet vent. I would think their is a blockage or something that it is not pulling air in to vent. How does it drain? I always use a little more treatment then they say to use.
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Old 07-05-2011, 06:07 PM   #12
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If I had not seen the pictures I would have questioned the idea too.....Pictures ARE worth a 1000 words. Seems a little short on design.
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Old 07-05-2011, 06:21 PM   #13
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Mikegp1 has a good ideal. But make sure when you do this not to use dish washing soap that has anti bacteria in it. Anti bacteria will kill the good bacteria that breaks down the odor causing bacteria in the tank. I never use any anti bacteria soap or body wash in a rv when using grey water tank. Never had a problem with odor
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Old 07-05-2011, 07:00 PM   #14
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I have to say that if it was my camper, and out of warranty, I would cut that riser and put a black plastic interior vent in its place. Wow that is totally bogus design IMHO.

What is A Plumbing Check Vent? by Mark Bower - Manufactured Housing News

Glue on a threaded adapter and screw in the cheater vent. Air only goes INTO the pipe and never out of it.

You would have to plug that stupid hole in the wall. Maybe cutting in a hatch to access that cabinet from the outside?
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Old 07-05-2011, 07:44 PM   #15
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That would probably be the best bet. I agree with you Lou. If he can't figure it out that is the next best thing.
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Old 07-05-2011, 10:21 PM   #16
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I can't believe that they installed the vent pipe like that... I located one of those check vents beneath my sink in my bedroom, seems to work very well...
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Old 07-06-2011, 08:17 AM   #17
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Located a check vent today. I have the tools in the camper for installation if my final attempt to flush out today does not work. Leaving shortly on vacation again. We all agree on poor design, now with education, walmarts lemon grey tank cleaner a check vent and thankful input I will have a conclusion to my STINKY GALLEY PIPE. THANKS AGAIN ALL who gave me ideas and input.
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Old 07-06-2011, 08:38 AM   #18
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Don't forget you will need an adapter for your riser. You will have to cut the pipe as high as possible in the cabinet; cement a threaded female adapter to the stub; and using Teflon pipe dope (or tape) screw in the vent.
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Old 07-07-2011, 07:20 AM   #19
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Once again thanks for all the info to help solve my problem. After a day of talking to two more techs out of state that returned my phone calls I have some good advice. I believe this man has a very valid point I must share.
The cheater vent is a great add on vent to tanks that are already vented.EXAMPLE my vanity drains into the grey tank that is vented through the roof next to the shower. Im guessing that is how bsmall's set up is. So the problem with installing a cheater vent for my galley sink is that the gases will build up in the tank and probably back feed through the drains in the sink. So the moral to my story is I am left with option A. sucking up the fact I have a poorly designed system,cleaning my tank more frequently and dumping lots of money into chemicals or option B looking for a route behind lots of work to reroute my vent through the roof.
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Old 07-07-2011, 09:29 AM   #20
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Wow, what a poor design.

Just so I understand, you have two gray water tanks but only one of them has a roof vent (the bathroom gray water).

The kitchen gray water tank has no roof vent just that sidewall vent? So as the kitchen tank fills there is no place for the air to go but out the side wall or up the trap into the camper.

Yup, that does blow IMHO.
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