My latest error on the motohome!

My latest mistake over the weekend almost cost me, but I really lucked out. The toilet was starting to back up a little and when you opened the valve, sometimes you would get a bubble back indicating some pressure build up in the black tank. I assumed that my roof vent may be blocked. So when it came time to pack up and empty the black tank I decided I'd try and do a really good clean out of it. So I ran quite a bit of water into it and then opened the valve and drained it out hoping to get as much debris out as possible. I closed the valve and left the water running and got distracted and forgot about it.

I was over on the right side of the motorhome when I noticed water start to drip from the roof. I had the A/C's running so I thought it was from them. Then all the sudden the flow increased to a small waterfall from the roof. As soon as that happened I knew exactly what I had done. I ran over to the other side and turned the water off as fast as I could and pulled the black tank handle at the same time. I was almost afraid to go inside the motorhome because I was anticipating that I had made a huge mess. But I went inside anyway and was very happy to see the toilet valve held! There was a little backup into the toilet but no overflow. So no mess and everything worked fine and if in fact the roof vent was clogged before, it is most certainly cleaned out now! I do not recommend that method for cleaning the black tank vent however.