Toto toilet with gmax flushing system blue top

there should be a screw adjustment on the ballcock or fill assembly...screw that down some to adjust...that regulates your tank water level....that screw goes in or out to adjust...one or other should do the trick...may have to do this a few times to get proper adjustment...good luck..

Replace the assembly. This is common in areas with high mineral content in water. You will be glad you did. Delay too long, you may find your toilet running while you are at work .

turn off water to toilet.Take the three top screws out of the flush valve .Which is that valve the water pours out from to fill the tank.clean the diaphram inside.Probably see alot of dirt inside.You'll probably want to take all your aerators off your faucets and flush the dirt out of them too

The ball float follows the tank water level, and repeated cycles of the float dropping and opening the fill valve would likely reflect a leak in the flush valve. You could try adjusting the float arm downward so that it will respond to a lower water level. Try turning off the supply valve, flushing it and listen for water leaking past the flush valve after it closes. If it does, replace the flapper or adjust the chain.

check the pipe connection from water tank

WATER LEVEL IS NOT PROPERLY ADJUSTED. REDUCE WATER LEVEL TO FILL LINE

Is it not refilling the tank or the bowl? I've got a toto also that is not fully refilling the bowl after each flush. No leaks or other problems. Tank refills fine. Seems that the flapper doesn't float long enough to allow a sufficient amount of water to drain into the bowl before closing. Any ideas?

I am not a plumber but stumbled across the solution on my own. While watching the float during the flush cycle, it was obvious that it was very slow in moving downward along with the water level in the tank. The problem was that the small opening in the float chamber was partially clogged. Using just my fingers, I reached under the float chamber and cleaned off any debris that was blocking the opening underneath the float chamber. Put the float back on, and instantly the problem was solved. The tank fill started immediately after I flushed.

Remove the tank lid and look at the fill valve. Is it a yellow valve?
This fill valve is common on the Toto Toilets and can easliy plug with debrie.

They can be disassmbled and cleaned. however, I usually just replace the valve with Fluid Master Fill valve.
You will also want to check the water coming into the toilet by turning off the water that supplies the toilet and disconnecting the water supply line. After removing the water supply line turn on the water at the valve to make sure that the water is flowing properly. Check the supply line also to make sure it is not plugged.
Be sure and place a small container to catch the water that will come from the valve. A towell will also help from making too much of a mess.
If the Supply line and the valve are clear the problem is in the fill valve.
The G-Max system denotes the Flushiing system which is a 3" flapper that allows the water from the tank to flow into the bowl quicker.
Good Toilets!

sanray

What you are experiencing is a flapper valve problem. Since I don't know what model you have I will give you a link to the generic GMax unit. Here is the parts breakdown for a GMax

Toto GMax

I would suspect you need part #7 on this diagram a flapper valve. Take the old one with you since different colors ones are used on different models. You should go to the Toto site to locate a dealer first. You can find their site here:

Toto USA

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