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

So you are getting rid of it for ever and never intend to use it or its black tank again?

If this is a permanent removal, after the floor flange is removed, use a wood rasp or tilt base jig saw to bevel the opening to about a 45 degree angle. Cut a wood plug with a mating bevel and glue it in place with a good quality construction adhesive like LePage or Loctite PL series.

Or use a router to remove 3/8 of the floor material 1.5" around the hole and glue screw a plug in.

I have a 3" ABS pipe for a toilet drain. When I relocated the toilet, I glued in a threaded fitting that accepts a threaded cap on the vacated location. I figured that if I ever needed to clean the black tank thoroughly, the additional entrance location would make life simpler.

"So you are getting rid of it for ever and never intend to use it or its black tank again?"

Then OP won't need the stove, oven or fridge. Those lead to....needing the appliance being removed.

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

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

I believe your referring to a temporary test plug used for leak testing. Lowe's, Home Depot they carry them.

Youtube has everything you want to Know :B

To answer Dave and thanks for that, yes we are going to composting toilet and quite certain the black tank will stay history..
Thanks to all for the great responses... I will update as we go..