Flushmate has a recall. Unfortunately, ours is one of them. We actually had another Flushmate toilet on our main floor, but a few years ago, I noticed that the inner tank was leaking water into the porcelain tank (which is supposed to have NO water). There was no help with it, and replacement of the pressurized tank was more than we wanted to spend, so we replaced it with a regular toilet.
Here is one disturbing video of what happened when the unit exploded.
Here is another video. At the time this guy made the video, there was no recall, but now there is.
I have turned off the water to the toilet, as suggested by Flushmate, until the repair parts arrive. I am thinking maybe a new regular toilet for our downstairs might be in order. This recall notice sure scared the ‘crap’ out of me!