Originally Posted by Rvinlori
We have owned our 26' TT for about 3 years, used primarily for weekend camping trips. We have recently moved into it full time while awaiting a major move. We have a really bad odor coming from the black tank and have tried all different chemicals, flushed the tank, and it continues to smell everytime we flush. Could this be caused by the outside temps (average 100 degree days)? Any suggestions would be greatly appreciated.
OK. Now that you have tried everything others have suggested here is my idea. Obviouly you have a bunch of %%&@$ that is not flushing out of your tank and it could be many things. not using biodegradable paper to mention one, sanitary napkins two.
OK whatever it is you want to flush and get rid of it once and for all.
I would hookup a use garden hose with a small high pressure nozzle from outside spiget and bring it into the trailer. You will need two people to do this to turn on and off.
Open the toilet and feed the hose down the hole and into the tank. Usually 3 to 6 ft would do and let the toilet flapper close holding the hose.
With the outside black water valve closed turn on the water hose and you should hear the high pressure water coming out of the nozzle in the tank. It may even start moving around which is what you want. This will pressure wash all of the tanks interior. Depending on your tank size I would wait for at least 3/4 full and go outside and open the valve to dump into the sewer. I would do this as many times as needed or time permits. If you do it enough I'm sure sooner or later the &&$% will flush out. If you run out of time I would make sure you fill the tank 3/4 with fresh water and start again the next day.
Now I used a clear 45 degree clear plastic adapter at the dump valve so I can watch the color of the water. This may help so you have an idea if you are really getting clear water out of still brown or black water.
Hope this helps in your next step in eliminating the nasty smell.