Well, not sure how much help this will be, but, my parents have a Washlet on an AS. I don't know if it's a Cadet 3 or Champion 4. It's one of those two. Dad installed it. It's a bit wobbly to the point it can slip off the side of the toilet rim. A plumber installed mine on a Toto toilet. No problem whatsoever. Toto has a list of (non Toto) toilets their Washlets will fit. Mom and dad's was ON the list. So, I don't know if their problem is an installation one the toilet. Monica

OK pricklypearcactus, you're making me do alot of research now.... Here's the 3" flapper, model# THU175S, used on Toto "G-Max" 1.6gpf toilets, like the original, now-discontinued Drake: That flapper, from what I've been told, can be replaced by model# THU140S, which was used on their "Power Gravity" 1.6gpf toilets that were their midrange models - G-Max was their high-end. Note the lack of a hole on the side, which keeps it from falling until the water level is lower, thus sending more water to the bowl: But both of those 1.6gpf designs have been discontinued in favor of two 1.28gpf flush systems: E-Max (on most of the "Eco" models) and Double Cyclone (on most of the "II" models). Now here's where things get complicated - all of these seem to use a whole new range of flappers - a quick search turned up at least three new ones - THU253S, THU277S, and THU299S. Amongst the changes, most (all?) of these have added a float that sits above the flapper. I don't know if the float can be adjusted or removed - haven't seen one in person yet. There's a picture of the flapper from the Eco Drake, which I think uses the 277, on Terry's site: (here). To get an idea of the difference, look at the parts diagrams for the old 1.6 Drake and the new 1.28 Eco Drake. Now see the difference in part #6, the flapper? It does seem, as Terry noted, that the rest of the tank (and the bowl for that matter) haven't changed - compare the other part numbers. Maybe all you need to do to convert an Eco Drake into an old-style G-Max Drake is remove the float, or at least swap to the old flapper, although Terry says on his thread that the flush valve is different too. There was a 1.6gpf Double Cyclone in the lineup until recently (on the Neorest, Soiree, and Guinevere) - I can't find what flapper they used. This is way more than I ever wanted to know about toilet flappers....

I have 4 very recent (last 3 years) toilet purchases, from a Jaccuzzi- not worth discussing, to a Kohler (Ingenium, I think), AS and Toto. I think one must distinguish old from new, 5 gal flush from 1.6 from even less... The latter 3 are all excellent. Differences are notable from water spot size, to noise, to clean bowl. BUT I would still buy any of those 3 again, the AS cadet and Toto Promenade are the most similar in function, but the Toto is much more quiet, for certain. I find that MaP thing a little cumbersome to read... antss- yes, studies must show their data: study size, confounders, statistical significance of results, etc., ;-). Where is the p value?!?! And to note, in allll the yeeaars of using CR, which has been very helpful, one does need to understand that the rating is definitely cost related- best value for the dollar. I have purchased things that were top of the list, but definitely not the top product. I have learned. They don't always prioritize the same as I would, and it can be difficult to pick apart that subtlety.

We bought a Kohler Cimarron at HD when it was on sale for $128. The prior American Standard, the kids clogged at regular intervals. So far with the Kohler it has not clogged once. So far I am impressed how much it can move with 1.28 gl.