This is a sample pic of a Toilet Flange. Bear in mind that it is upside down in this pic.
The TOP (bottom in this pic) is where the toilet rests on a foam rubber sealing gasket. That gasket plays the same role as the beeswax seal at home.
The Flange is secured to the Black Holding Tank. It probably screws on, with male or female threads since both are used. Then as previously mentioned, it screws to the flooring material. And, like a home toilet, bolts slide into the slots you can see in the picture, heads down, and the toilet fastens down to the flange with nuts on washers, compressing that foam rubber ring.
In the first coach we bought the toilet rocked. We found that the professional installer left a short piece of water pipe under the edge of the toilet. Removed that and could fasten it down solid. In our next coach, the flooring had deteriorated and prior owners had broken the flange trying to pull the toilet tight with the bolts. When I pulled the toilet and found the broken flange I also found the flooring was rotted from a loose, leaking fitting on the flush valve inlet. Without a flat, solid, surface, the toilet will never feel solid.
I bought a "Pedestal" that raises the height of a "tall RV" toilet to the height of a "chair height" home toilet. The height is nice, but what I really wanted was a bigger footprint, out onto solid flooring. I also decided that step alone would not result in a solid repair so I undertook a flooring repair/restoration documented
here at Rot Doctor.Hopefully whatever's got your potty a-rockin' won't be anything like ours, but all you need to begin investigation is a new foam ring, an open end wrench, and the water turned off. I added a shutoff valve while working on ours so I could shut the toilet off if it got into trouble on a trip without shutting sinks etc. off. It's a "shark bite" type from Lowe's but meant for plastic tubing.
And... Brand of toilet shouldn't matter. Aquamagic is entry level but ours works fine.
If God's Your Co-Pilot Move Over, jd
2003 Jayco Escapade 31A on 2002 Ford E450 V10 4R100 218" WB