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Old 07-06-2009, 01:02 PM   #1
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Toilet smells bad.

We have a 2001 Forest River Sierra. We bought it used last year and didn't have any problems. However this year we are having trouble with a very bad odor coming from the toilet. Even with a few inches of water in the toilet it still stinks. I am going out to the lake later this weak and was wondering if anyone had some suggestions. It is a thetford brand. We clean it regularly so that isn't the problem. I also do not dump it until it is full. Thanks for any help.
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Old 07-06-2009, 02:16 PM   #2
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Originally Posted by rpiper View Post
However this year we are having trouble with a very bad odor coming from the toilet. Even with a few inches of water in the toilet it still stinks. It is a thetford brand. We clean it regularly so that isn't the problem. I also do not dump it until it is full.
First, you need to know that most all toilets are not air
tight! The smell is not coming up thru the dump valve
in the bottom of the bowl but rather thru the holes in the
back of the toilet where the foot pedal connects to the
water valve. Also thru the holes the seat pivots in.
If there is any negative pressure in the trailer such as
from an exhaust fan running, it will pull odors from
the holding tank past these holes in the toilet.
We usually run our ceiling fan in reverse so it's bringing
air INTO the trailer rather than exhausting. This helps
a lot.
Never run any exhaust fan unless you've got plenty of
windows open.

Hot weather greatly increases the stink factor.
Waiting until your tank is nearly full is another big factor.
Are you using plenty of RV holding tank chemicals???
I usually use double the amount shown on the bottle
if the weather is hot.

No negative air pressure and plenty of chemicals usually
keeps it down to a tolerable level for us. If you're using
plenty of chemical and still have a bad stink, try another
brand. There's lots of different ones out there.
Wally World has a couple in their RV isle.

Good luck!
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Old 07-06-2009, 03:09 PM   #3
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Flush it out several time it probably has turned septic and that is nasty and dont wait till it full to dump it. I would dump it every few days or more if you can since it getting hot that speeds up the stink factor
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Old 07-06-2009, 05:26 PM   #4
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we installed a Lil Stanker and love it, we had one on our other trailer and it seems to do the trick, seems to work well even when the heat kicks up, It has 2 speeds to choose from. Still use the chemical too...
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Old 07-06-2009, 06:18 PM   #5
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Thanks for all the help

Thanks for the help. I will try these helpful hints and hope it clears up.
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Old 07-06-2009, 11:26 PM   #6
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you could also check the roof vent to make sure it's not plugged by something.
Some people use a new venturi type stack cover with some success.

Dan is probably right...negative pressure.
I'd also dump before full...and use tons of water in the tank.

When I had tanks, I'd sometimes dump CALGON water softener into the water when I flushed/rinsed. After it was clean, I'd add some liquid TIDE or other brand soap to the water before using the toilet again. Didn't even need the chemical with enough water and soap in there.
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Old 07-11-2009, 12:58 AM   #7
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toilet stink

Can you run bleach through it to solve this same problem?
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Old 07-11-2009, 06:57 PM   #8
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Try the Calgon. That's what we do, and the smells are minimal to none. I do use the deodorizers as directed, also. The Calgon keeps unwanted debris from sticking to the inside of the tank. Before leaving to go camp, put in an EMPTY tank one cap full of Calgon, some deodorizer, and a gallon or so of water. That way, driving your rig to the campground will slosh the mix around in the black tank, and that should alleviate your problem. Hope this helps you! Randy
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Old 07-30-2009, 05:04 AM   #9
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Thumbs up Thanks, problem solved.

I poured some water down the vent on top of the trailer before I dumped it. I then rinsed it out good and added Calgon. We have not had a problem since.
Thanks for all the great advice.
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Old 07-30-2009, 07:52 PM   #10
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I found that the Flush King, that I purchased at Camping World, is a great way to backfill and empty my tanks. Really keeps the odor down. Absolutely love it. Here's the link: http://www.campingworld.com/shopping...ush-king/20522
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