Sewer Odor (most likely the grey tank)

RayChez wrote:
Well the lack of chemicals is not the reason why it smelled. It had to be either a trap did not have water in it or you might have a plugged up vent. That is the only way that water would be syphoned when you dump the water somewhere else like the kitchen sink.

Now as to chemicals: The old blue stuff is a waste of money because all it does is camouflage the smell. What you need is enzyme product to clean out the garbage that has gone down into the grey tank. The same goes for your black tank. I use Happy Camper which eats up all that is in the grey and black tanks keeping them clean and when you dump it does not run the neighbors out of the park. Some RVers think that by using lots of water solves the problem. (WRONG)
You would be surprised when you flush the dish water how much sticks to the inside walls of the grey tank. Enzyme product will clean it out and you will never have bad smell.

Ray... you must be a salesman for Happy Camper. If not, the above post is strictly your opinion and as such, not necessarily true. However, you are entitled to your opinion, true or not. So go ahead and pay the $$ for that stuff...it's your money.

Ron