Pros: fits in small space, efficient, quiet
I was admittedly skeptical that a 1.28 G/flush model would function acceptably, no less work WELL. I was even more skeptical when I first tried it, because if you don’t hold the handle down, the flapper closes long before the upper tank is empty, making me believe I’m not getting even my 1.28 G/flush worth. On top of that, while flushing and refilling, the toilet is incredibly quiet. So, how is it possible that it could work at all?
Though I am unable to answer that question with even a modicum of technical understanding, suffice it to say that this toilet works not only well, but amazingly well! Certainly, part of the functionality is the 2 1/8” trapway, only an eighth inch smaller in diameter than the largest I’ve seen. Another is the oversized 3” flush valve which initiates a powerful (yet quiet) flow of water from the tank into the bowl, mostly through the jetway, the primary thrust mechanism in the flushing system. (The flush valve is the opening normally covered by the flapper. In this system, glued to the bottom of the flapper is a large round ring that accommodates the significantly larger than normal valve.)
Finally, the water saved is significant, if only evident by how quickly the tank refills after a flush compared to my old toilet. I’ve only had my Cadet 3 for a couple weeks now, but so far at least, there are no signs of it even thinking about plugging up, and only once did I have to hold down the flush lever for a second or two to use most of the 1.28 gallons to complete a larger than normal solid flush.