black tank not venting?
We have a 2020 high end 5th wheel and also own a 2019 motorhome, and have owned many other coaches. This is the first time we have had this problem and I suspect a black tank venting issue but I welc...
Forum Discussion
MFL wrote:
^ Could be what Rob describes. If bathroom roof vent is open, and especially if exhaust fan is running, it will draw odor when flushing, since that is a direct vent.
Jerry
Yes Jerry.. Sounds like Skibane and Second Chance hit the nail on the head. Makes perfect sense to me and I hadn't thought of that, but yes obviously when the tank is only 1/3 full the gas that collects in the top 2/3 escapes out the vent as designed; but once it hits 2/3 full and the vent pipe, which is stuck too far into the tank, gets below the water level, now the gas would collect in the upper 1/3 and remain there and then escape out the open hole when the toilet is flushed, exacerbated of course if the roof vent is pulling air up from the tank. Great reply. I have written Vanleigh to see if they agree, but given the conditions I have described and the air pressure which built up when I pressed the tank up almost full, this makes perfect sense. Thanks Guys!
