text: Both of these TOTO toilets are using the Tornado flushing system, which is similar to VorMax. But instead of one jetted waterways for bowl rinsing, they have two. Extremely powerful at bowl rinsing and removing solid waste. And just like the VorMax, they are also rimless. And if you prefer a toilet that is really easy to clean, consider the one-piece TOTO Ultramax II. You will love it.
  if the two silicone flaps leak or runs every 5 minutes take them off and place on a flat brick surface,in the 80 degree sun all day will slowly fix them back an will work again.Takes curve out an any bubble. saved 20 bucks or more for new ones. just flushed with a bucket of water poured in til i put the flappers back on. The Flaps may have a slight curl istead of being flat after awhile an also develope a bubble in the silicone. after baking on the birck slowly all day the flaps were back to normal and could use again. believe now that you should never put any cleaner stuff in the tank probably over time messes up the silocone flaps. Putting a cleaner in the toilet seat area probably ok .
  I bought the Optum Vormax a couple years ago and generally it’s worked well. I’ve had occasional instances of the second float getting stuck under the other flapper but that’s easy to take care of. I read that AS has a fix for that and also read where somebody just used a piece of wire to restrain it from going over too far toward the 2nd flapper. Other than that I had a problem with it running for way to long after it flushed. It would eventually stop after about 5 minutes so I left it that way for a while. Finally I decided to see if I could fix it and it turned out to be super simple. The water level was just going to high and the big float needed to be adjusted down. I’m in the market for another toilet to replace a different AS (the “flush a whole bowl of golf balls” one – junk), and was considering getting another Vormax. I may take another look at the Toto’s though.
  I purchased this American Standard Optum VorMax on August 17, 2015 at the Home Depot. It seemed to work “OK” for a few days. Since then, we have to be careful how we flush the thing or else nothing happens except for a swirl of water. It is now March 25, 2020. We are going to remodel/upgrade our bathroom. The first thing to go will be the toilet. I don’t know what I’m going to replace it with but it will not be an American Standard. I will NEVER buy that brand again.
  I bought an Astute/Optum Vormax in 2016 and it’s had issues since day one. I did solve one issue which was the tank water level would drop an inch within an hour of flushing and then stop dropping. I discovered the little clip holding the hose above the overflow tube was causing water to creep up the clip from the tank and into the overflow tube, draining the tank until the water level fell below the clip. I fixed it by raising the clip so it barely sits on the tube.
  Second problem is the flappers seem to close too soon. Half the water in the tank remains after a flush. I adjusted the teeter bar per install instructions but no better. The only way to get the whole tank to empty is by holding the handle down when flushing. This is forbidden by Am Std because it puts air into the pipes which then requires multiple flushes to prime the system. So make sure you tell your house guests not to hold the handle down or else there will be sewage swirling around the bowl for the next guest. Nice. Most expensive toilet I ever purchased, and the worst. I’m dead serious, my previous toilet cost $28 in 2009 and was better than this “high end” model.
  I just talked to Am Std who tells me the toilet is working the way it’s designed, i.e. it’s only supposed to release 1/2 tank of water. Not good. Bad. The woman I talked to couldn’t care less. Was bored with my problem. Can do nothing to help. “Buy a new toilet.” Yeah, thanks lady. She was also bored to hear about my 1st problem with the hose clip and my fix for it. Will never buy American Standard anything ever again. Going with 3rd World Standard from now on.
  Rub – thank you for your insight. I too was concerned about the half-full tank after flush. The sales tech told me that the three design reasons are: 1- The residual water level is needed to make the floats work correctly up to the flappers closing. 2 – The higher tank level produces more water pressure during flush. 3- The residual water helps temper the temperature of the fresh water refilling the tank. Helps reduce exterior condensation.