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rbcamping's avatar
rbcamping
Explorer
Sep 25, 2018

Bad odor when flushing black tank

When I dump the black tank and flush is causes the whole camper to smell.
I close off both grey tanks, dump black tank with the flush system running while, flushing, then I close dump valve for a couple of minutes with the flush system on, and then dump again to get a good rinse. I do not over fill. The last few times I have done this I get a strong sewage odor inside the RV. No leaks that I can see. Any suggestions on what to check?

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  • NMDriver2's avatar
    NMDriver2
    Explorer
    Sep 25, 2018
    If you are running your flush before opening the black dump gate and have some obstruction in the vent you may be building up some air pressure in the tank that is escaping up the toilet. Just a guess. Normally a rush of water out of the tank should draw air in not push it out.
  • downtheroad's avatar
    downtheroad
    Explorer
    Sep 25, 2018
    Just guessing....maybe??
    Fantastic Fan running or maybe a window or door open sucking in the odor from the vent stack??

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