MitchF150 wrote:
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Turned out some TP had gotten wedged in the gasket where the blade slides in and that caused it to not seal completely...
This is the part you should remember for future dumping. I've seen a lot of people just close the valve when water stops flowing out. Unfortunately, this can often be caused by a small blockage at the valve (TP). To make sure this doesn't happen, you should always flush the tank after dumping. If you have a long line behind you at the dump station, you can have a 5 gal bucket of water waiting and empty it down the toilet before you close the valve.