Fluidmaster 400A - STEP 6: FINE-TUNE TANK WATER LEVEL; CHECK TANK WATER LEVEL; ADJUST WATER LEVEL

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STEP 6: FINE-TUNE TANK WATER LEVEL
A: FLUSH THE TOILET TO CHECK
THE TANK WATER LEVEL
After the water stops filling the tank,
the water level should be roughly ½
inch below the top of overflow pipe to
ensure a proper flush.
1/2"
Overflow Pipe
1/2"
Water Level
Overflow Pipe
Top of
Overflow Pipe
Tank Water Level
Adjustment Screw
Float
B: WATER LEVEL IS TOO LOW
Turn the tank water level adjustment screw
clockwise to raise the float. Flush to reset
water level.
WATER LEVEL IS TOO HIGH
Turn the water level adjustment screw
counterclockwise to lower the float. Flush
to reset water level.
MORE
WATER
+
LESS
WATER
–
Tank Water Level
Adjustment Screw