Bests & Worsts Reviews from Amazon

I had some reservations about purchasing this product due to the negative reviews, but after having the unit installed in a 1987 American Standard for a few months I think I can safely say that if you are careful about following the instructions (and they are a little complex), you'll be happy with this purchase. $30 beats $250 for a new dual flush toilet, and you keep a hundred pounds of ceramic out of a landfill. I do have some advice to give to future purchasers of this device: First, read the instructions through once before you install the device. It's good policy for any installation, but these instructions really are at what I'd call the high end of a layman's capability. What's more, you really can't count on the manufacturer's support -- I made two calls on two separate days, during business hours, and was shunted to voicemail both times. I never received a call back. Fortunately I was able to resolve my problem myself (see "Third," below). Second, everything about setting this unit up requires /firm/ pressure, and nearly every part that moves in this device locks into or out of place with a loud snapping sound. You're going to think you've broken something at least once during installation and calibration. Don't let it scare you. Be careful, but don't be too gentle. Third, when you install the dual-flush converter, it comes with the blue float (which sets the quantity of water to use in a light flush) set to the highest point (the smallest possible amount of water). As part of the calibration process, the instructions will tell you to test light-flush the toilet, moving the blue float downward each time until the bowl drains completely. What I discovered was that repeatedly light-flushing the toilet will cause a false positive result (a light flush will succeed when the blue float is still set too high), and then you won't get successful light flushes later, which can be frustrating (and gross). I found that test light-flushing the toilet gave me false successful light flushes only four clicks from the highest setting, but to get consistent successful flushing over a period of days, I needed to be about five clicks from the lowest setting. This is still a lot less water than is used for a full flush! What I recommend is this: 1) Install and calibrate the device according to the instructions. 2) Press firmly down on the blue float until it reaches its lowest point (the largest possible amount of water). This will make a loud ratcheting noise; again, don't worry, you haven't broken anything. 3) Use the toilet normally for a day or two. 4) Once you've determined that the toilet always light-flushes successfully at this setting, pull the blue float up three clicks. 5) Repeat steps 2-4 until you start getting failed light flushes. 6) Press the blue float down one click. 7) Use the toilet normally for a day or two. 8) If you start getting failed light flushes, repeat steps 6 and 7 until you don't. 9) Rest easy knowing that your light flush is properly calibrated. Update: bought two more for the upstairs bathrooms! May 2014 Update: I've noticed that the supplied zip-tie securing the flush meter to the fill pipe has broken in all three of my installations, the last of which I performed only last year. I believe the rubber o-ring around the fill pipe is still keeping the gasket secure, so I don't think this is a major fault, but be advised that if you are performing a first-time installation you may want to replace the supplied zip-tie with a sturdier one you buy yourself. December 2014 Update: In the interest of full disclosure, because this review gets so much attention, one of my installations failed after about 26 months. My other two are still going strong, and I suspect it was not a defect in the device. We had one of these -- Kaboom with OxiClean Scrub Free! System-1 ct -- installed, and it appeared to be leaking highly concentrated cleaning solution into the tank. I think that what happened was the cleaning solution in the tank ate an internal seal in the flush valve, which is a thing that happens. You should never put cleaning solution of any kind in your toilet tank. The failure was slight, a very slow drip, but every time it dripped it made a loud pinging that resonated throughout the downstairs of the house. I could not correct it by manipulating the valve, so It had to go. Rather than install another one of these devices we decided 25 years was a good run and installed one of these: American Standard 2989.101.020 Concealed Trapway Cadet 3 Right Height Elongated Flowise 1.28 gpf Toilet with Seat, White. December 2017 update: My two remaining installations are still working perfectly, five and a half years later.