Adjust water level to the line marked "WATERLINE" on the inside back wall of the tank. Adjust the water level using the Brass Water Level Adjustment Screw on the top of the ballcock.

TO RAISE THE WATER LEVEL - Turn screw counterclockwise.

TO LOWER WATER LEVEL - Turn the screw clockwise.

1) Adjust water level to marked WATERLINE. (See above)

2) Fully open Water Supply Valve to tank.

3) Make sure all waterways are clear of obstructions.

4) Insure that drain line and vent are clear of obstructions.

1) If water is running over the top of the Flush Valve Float, lower water level. (See "FOR OPTIMUM PERFORMANCE" above)

2) Check for Flush Valve Seal leakage by dropping food coloring into the tank water. Leave the toilet undisturbed for several hours. If food coloring appears in the bowl water, check items 3, 4, 5 & 6.

3) Make sure the Trip Lever is not binding the Flush Valve Float. Bend Trip Lever as needed.

4) Check that Flush Valve Seal is seated in the top groove of Flush Valve Body.

5) If Flush Valve Seal is rough or wavy, replace using Kit No. 630-0030.

6) Check that the bottom edge of the Flush Valve Float is smooth. Use fine sand paper to smooth minor irregularities. If still rough, replace Flush Valve Float.

7) See "Ballcock Will Not Shut Off" below.

1) Inspect Ballcock Diaphragms for damage or debris. Shut off Water Supply Valve. Unscrew the Ballcock Locknut. Remove the rubber diaphragms from inside the Ballcock. Wipe off any debris. If damaged, replace using Kit No. 630-7984.

2) Check water supply pressure. In normal installations, the tank should refill in 30-60 seconds. If the fill cycle is shorter than 30 seconds, you may have excessively high water pressure or flow. Partially close Water Supply Valve to control fill rate. Adjust for a 30-60 second refill cycle.

3) See section above.

1) See "Ballcock Will Not Shut Off" above.

2) Partially close Water Supply Valve until noise decreases.