How can you adjust the water level of a Toto valve's water supply?

This is how to adjust the fill valve of a GMAX.

How to Adjust G-Max Flushing Systems

1. Turn off the water supply to the toilet at the valve located behind the toilet.
2. You can remove the G-Max refill valve from the refill tube by pulling it out with your fingers.
3. Once more hold the fill valve shaft and turn the cap counterclockwise to release the valve.

How do you adjust the water level of the toilet bowl? The water level is determined by the height of your float. To adjust the water level, make 1 full turn of the fill valve screw. Counterclockwise to lower the water level. To verify that the problem is resolved, turn off the water and flush the toilet.

How can I raise the water level of my Toto toilet bowl's water tank?

1. Take off the cover from your Toto toilet water tank.
2. Find the water level markings on the inner wall and toilet tank.
3. The water level adjustment screw is located on top of the water valve.
4. Flush the Toto toilet, and then check the water level.
5. Replace toilet tank cover.

Why is my fill valve always running?

An adjustable float controls the water level of the tank. An float set too low will cause a weak flush. If it's too high, water can spill into the overflow tube for the toilet and the fill vale won’t shut off. The toilet continues to run . If the toilet does not stop running, you can adjust the tank to float up or downward.