Originally Posted by rpiper
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
Never run any exhaust fan unless you've got plenty of
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.