Removing RV Toilet: How to plug the hole in the floor???

IT_Burnout wrote:
One other idea, I seem to recall running into something on this subject out on you tube while searching upgrading to a composting toilets. I never did it but they talked about removing the toilet and some kind of flush rubber plug the fits into the flange and tightens right into the pipe and it and seals it tight. If memory serves me correct you twisted it and it expanded into the pipe. I also remember folks putting some kind of secondary twist on sewer close valve on the end of gray\black water outlet. After flushing the black tank real good, they opened the normal gray and the normal black valves all the time and it combines all the tanks to one big gray tanks with a new drain valve twisted on the end. In essence it doubles the gray capacity by incorporating the black with it. I hope what I wrote makes some kind of sense. I think if you do some searching on you tube you might find the info if its something that would work for you. As I remember It sounded like a pretty easy solution.
Bob