Sewer smell in RV

[grands24]

I have an EVO T2460 that I bought new three years ago. Recently this past year I have had issues with the black tank smell to the point we can’t even enjoy using the trailer anymore. I have run a hose down the vent through the roof to the tank, flushed the tank and I have filled the tank with bleach water all the way up to the toilet and let it soak for three days. I have filled the tank all the way to the top of the toilet to check for leaks no leaks I think my vent cap might be too close to the pipe but I had no problems the first two years I had the trailer this last year I cannot get rid of the smell. Does any have any idea if a cyclone vent will help?

[ependydad]

Have you tried replacing the air admittance valve(s) under the sink(s)?

[Thurman]

x2 on checking the AAV. Usually found way up under the bat sink in the tightest place they could put it in hopes the future owner has to find it. IF/when you do find it just give it a few taps with something like the handle of a screwdriver. There is a moving part in these valves that sometimes sticks open allowing black tank gas smells to enter the bath area via the AAV.

[fonzie]

If you have a Dometic toilet model #300 might be the issue, check thread below...

http://www.forestriverforums.com/for...or-170420.html

[Griff02]

X2 on checking your type of toilet. Ours didn't take that long to start smelling, but if yours didn't leak too bad it may have taken a while to build up. If you have that toilet, use your phone to take a picture into the opening in the back, if there is liquid in there, that's your smell. Dometic replaced ours, so far the replacement is ok.

[TheWolfPaq82]

Have you tried cleaning the "GRAY TANK" ?? We had odor problem in our old Jayco. Thought is was Black tank...NOPE...Gray tank was the problem. Filled it with water and "Blue Liquid" let it sit for several days and flushed multiple times...Odor GONE !

[D W]

Originally Posted by TheWolfPaq82

Have you tried cleaning the "GRAY TANK" ?? We had odor problem in our old Jayco. Thought is was Black tank...NOPE...Gray tank was the problem. Filled it with water and "Blue Liquid" let it sit for several days and flushed multiple times...Odor GONE !

Good point! Often the gray tank can develop odors that are far worse than black tank odors.

[ptylerp]

There is also gray tank crystals/pellets that you can get to add to the gray tank. They just lay in the tank and reduce the odor. Our Galley tank was bad about admitting odors into the trailer. Now a 1/4 cup of pellets clears it up in no time.

[grands24]

Thank you all for your replies. My toilet is in a room by itself so it’s pretty clear it’s not the grey tanks and they have been cleaned and checked. My service advisor suggested a cyclone vent which I put on right away. So far so good, no more smell. I just hope it keeps working as well .

[D W]

A cyclone vent is fine as long as you have a breeze. Sewer odors do not originate by themselves. They come from raw sewage. I think there is another underlying problem. I would dose that black tank with some RID-X along with a substantial amount of fresh water. In 2-3 days the RID-X will start braking down the "waste" that is causing the odor. Don't add any more bleach! All that will do is kill the bacteria that is required to break the nasty-smelly enzymes down.

[ProfChuck]

We don't use anything in our tanks for breaking down waste anymore (sort of the GEO method, but, only a little dish soap) and the only time we get any oder at all is when we flush with the vent fan going! It sucks up the air from the tank into the room. Otherwise no smell at all. You learn quickly to turn off the fan while you flush and then turn it back on!

[TheWolfPaq82]

Originally Posted by D W

Good point! Often the gray tank can develop odors that are far worse than black tank odors.

When ours went bad in our old trailer....the smell would make a Buzzard puke.

[flattyattack]

Can someone tell me where the valve is on a 2013 Forest River Cedar Creek?
I have looked under both sinks and do not see a valve of any kind. Maybe show me a picture of what it looks like?
Thanks

[BandJCarm]

Cedar Creek what model?

Mine in bathroom is hidden behind a cutout in side of the cabinet under the sink. I replaced it with a Studor Valve once but it's tricky to NOT drop the valve when you have to get your whole hand through the little cutout.

[flattyattack]

We have a Cedar Creek Touring Addition 36CKTS.
There is a hole in the left side panel under the sink but all I see is a black pipe with a cap on it.

[fonzie]

Originally Posted by flattyattack

We have a Cedar Creek Touring Addition 36CKTS.
There is a hole in the left side panel under the sink but all I see is a black pipe with a cap on it.

Usually looks like this...

https://www.lowes.com/pd/Keeney-1-1-...e-Vent/1069119

[BandJCarm]

Originally Posted by flattyattack

We have a Cedar Creek Touring Addition 36CKTS.
There is a hole in the left side panel under the sink but all I see is a black pipe with a cap on it.

The cap is probably what Fonzie posted above. That cap screws on and sometimes needs replaced. The one I got was fancier at Lowe's, but I was camping it was all I could find.


https://www.amazon.com/Studor-20344-...SIN=B00MOOGJVO


FWIW, I had problems with this for 3 years. The Dealer fixed it and a tech fixed it, and I kept leaking from black tank......after awhile my insulation was soaked and the smell was unbearable.


Finally this past March we got under trailer, removed the belly pans, and there it was.......(had to throw away wet and stinky insulation). The adapter piece that goes between the black tank and the discharge tube (about 6 inch long) was not seated into the black tank, and never had been.



In one of the 'fixes', they had put butyl putty and bands around it to try and tighten it. No way that would ever have worked.


In April I took it to Amish Family RV and Orvan replumbed the whole thing, with a proper sized adapter that fit snugly into the black tank. I am convinced it is fixed, but only time will tell.

[flattyattack]

Thanks, I found it and also one under the kitchen sink, think I will pick a couple up just to have on hand. The one from Lowe's looks exactly like ours.