If you are just dumping the rv, most sewer agencies will not have a problem with that, the one I work for doesn't, we figure if you are dumping it probably means that for the last x amount of days you were not contributing so it is a wash so to speak. The problem usually comes when it is permanetly connected and the rv is being used as a second residence on the property. I would use my cleanout in a heartbeat and use the above argument if I was "Caught." Keep in mind this is how we operate here. If you don't have a cleanout, then you should anyways especially if it is a old house.
