How do I know if my American Standard Toilet Smart Flow valve system is working correctly?

Ok, I have determined that the toilet is running too much. I replaced the flapper and put a new ring below it, the seal seems to be working fine.





I have an American Standard "Smart Flow" (yellow and black plastic thingamajiggy) in place of a floating ball or Fluidmaster set up. When I turned the water back on and flushed, the water level rose to just above the lip of the center pipe (overflow pipe?), which goes into the pipe, an inch above the normal level. There is a rubber tube that runs from the Smart Flow valve, and water is also running out of this tube into the pipe (hence, more wasted water?). The water continues to run.





I cannot see a way to lower the water level. The arm that runs from the flush knob to the chain is about 45 degee angle (downward), and adjusting the chain length does not seem to do anything. There no place to adjust a wire like a Fluidmaster.





Need to know if this is something that I can adjust or replace myself.





Thanks!|||The Fluidmaster fill valve is adjustable for how much water you want in your tank. You can screw it down to lower the water level. You might have to loosen it at the bottom which means you will need to drain the tank and catch water below. It could be that it was adjusted higher than you want.|||Sounds like the mechanism is shot. Go to Home Depot and buy a new ballcock assembly with the floating ball. At least with those, you can bend the arm of the ball higher or lower to adjust the water level if the valve starts doing strange things like your current one. When you tighten the nut on the underside of the new ballcock assembly, don't tighten it too tight or you might crack the porcelain.