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Old 06-15-2012, 11:53 AM   #1
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FOUL Smelling Toilet in Fifth Wheel

Hi! We recently purchased a 1993 Prowler and I feel like as soon as one issue is laid to rest, another arises! This one I cannot seem to fix! Our toilet has this AWFUL smell come in every time we flush it. We dump the tank as we are supposed to and use the chemicals from the RV store. It seems to be as the water is filling back up and the smell gets stronger the more water you put in the bowl.

The smell is not like a 'port o potty' smell. It's like a horrendous chemical or gas like smell that literally makes you gag.

PLEASE HELP!
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Old 06-15-2012, 11:59 AM   #2
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check your roof vent. Mine had the same issue.

If it looks like this


chances are it isnt venting well.
You can replace it with a couple different options... the cheapest being this
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Old 06-15-2012, 12:01 PM   #3
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Make sure your roof vent pipe to the black tank is not plugged with a mud dabbers nest. Next is to make sure you are not running the vent fan when you flush.

You may also need to do a really through scrubbing of the tank. Put in two cups of powdered dish washer detergent, fill 1/2 with water and add 1/2 bottle of Calgone water softner. You can also add a couple of bags of crushed ice right before you start on a drive. Let this slosh around for an hour or more and then drain it with a 3" hose. This should break loose a lot of the "CARP" and such and help out. It the tank haas not been well maintained, you may need to do this a couple of times.

Oh and welcome aboard iRV2.

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Old 06-15-2012, 01:07 PM   #4
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Quote:
Originally Posted by CJ410 View Post
Hi! We recently purchased a 1993 Prowler and I feel like as soon as one issue is laid to rest, another arises! This one I cannot seem to fix! Our toilet has this AWFUL smell come in every time we flush it. We dump the tank as we are supposed to and use the chemicals from the RV store. It seems to be as the water is filling back up and the smell gets stronger the more water you put in the bowl.

The smell is not like a 'port o potty' smell. It's like a horrendous chemical or gas like smell that literally makes you gag.

PLEASE HELP!
TX iceman's advice is very good and certainly worth a try. If your tanks are fouled with dried matter companies exist that specialize in complete tank cleaning. One such company is RV Flush located in Southern California.
You may also want to look at the 360 Siphon roof vent, the fellow that invented it was the inventor of the 360 Shark Fin the first rotating unit. He discontinued it when he introduced the 360 Siphon because it has no moving parts and sits 2.5" above the roof line, guaranteed to work.
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Old 06-15-2012, 01:35 PM   #5
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Little something I discovered on my 5er..... >>> Turn off any exhaust fans before flushing the toilet <<< More so if all the windows and doors are closed tight. It seems that when I have any exhaust fan running and all windows closed, when flushing the toilet, it tends to draw air from the roof vent,through the black tank, and up the toilet. It doesn't produce an odor as bad as you describe, but nonetheless is noticeable.

the odor might not be so bad for me because I've done the detergent/water softener thing so may times to the black tank it doesn't take much of a drain and flush to have clear water coming out the bottom end.
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Old 06-16-2012, 09:05 AM   #6
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Are you sure its not the incoming fresh flush water coming smells? It can be pretty raunchy if the fresh water system needs sanitizing. There is a harmless water bacteria that produces hydrogen sulfide, the classic "rotten egg' smell.

If it doesn't have the potty smell, I would not leap to the conclusion that there is a problem with tank or vent.
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Old 06-16-2012, 09:20 AM   #7
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I have the metal kind of roof vents. I went to the RV store and he said that should be fine.

The rest of my water in the camper is fine and smells fine so I'm not sure it's that. They all come from the same source, right?!
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Old 06-18-2012, 04:43 PM   #8
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Foul smell inside

Quote:
Originally Posted by CJ410 View Post
I have the metal kind of roof vents. I went to the RV store and he said that should be fine.

The rest of my water in the camper is fine and smells fine so I'm not sure it's that. They all come from the same source, right?!
RV vent stacks usually have plastic covers and the refrigerator vent is metal. In an earlier post there were photos of typical holding tank vents and yours should look similar. Go to Drain Master . com and under ALL Products click on the 360 tab and just below the video is a list of roof vent comparisons chart. You need to identify which vent you have. You may find you have an 1.5" pipe protruding above the roof line with no cap at all, they are not a requirement to supply one when the RV is built.
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Old 06-18-2012, 07:06 PM   #9
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Try turning off the TT water and use a bucket to fill toilet and flush a couple times and see if you get the same results.
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Old 06-21-2012, 06:10 PM   #10
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What is TT water? I am so new to this. :/
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Old 06-21-2012, 11:23 PM   #11
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What is TT water? I am so new to this. :/
Travel trailer water meaning fresh water from the TT water tank. Don't worry, you will catch on.
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Old 11-16-2012, 04:26 PM   #12
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if it's a smell coming from your waste when flushing. you could try pouring some cooking oil in the tank. it will float on top of the liquid and keep the smell down until you drive. but when you stop it will float on top again. maybe a quart +-
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Old 11-16-2012, 04:53 PM   #13
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I agree with the other posters, it could be the vent or just a dirty, dirty tank (they really smell) OR a dirty tube just below the toilet. Turn off your water and hold the valve open with your foot. Using a flashlight look at the tube just below the toilet, it's probably never been cleaned. Pink mold and all kinds of other stuff can grow down there. We clean our tube every other time when we dump, just another thing to monitor!
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Old 12-12-2012, 05:42 PM   #14
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stink

This is a late response but if you determine the smell is coming from the black tank itself you might want to try this Camco tool at WalMart. The device attaches to the end of a garden hose and has a shut off where the hose attaches. The other end is flexible and has a spinning brass wheel that spins like crazy when the water is turned on. We use this about every other dump and it seems to pressure wash the sides of the tank and the toilet pipe if you carefully raise it up and down.

It has been very effective for us and will actually clean off the sensor so I can get a reasonable accurate reading of the level in the black tank.

Good luck and we don't use chemicals and my wife has an excellent nose for foul smelling stuff.
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