Remove the top of the tank. Find the overflow tube in the center of the tank. The water level should be approximately one inch below the top of the overflow. If the water is above the overflow, see diagram A for some adjustments options. If the water is just below the top of the overflow, sprinkle some powder on the surface of the water near the overflow. If it disappears down the overflow, see diagram A.

It is possible that the rubber tank ball that lifts when you flush (9) is not seating properly and water is running into the bowl and down the sewer. If the water is flowing continually into the overflow pipe, you have a large leak that is difficult to hear, but can be corrected.