Toilets, Sinks, Showers, Tubs and Disposals - Fluidmaster again

This is the second Fluidmaster I have insalled on my toilet.The problem is I can hear water dripping and sure as day water is dripping (fast drip) out of the little black tube that goes into the overflow pipe.
Is this a weak spot with fluidmaster valves?What is the use of this little tube anyway and why does it go into the overflow pipe seems like a waste of water.

The water tube is supposed to go only into the overflow tube.
Something is causing the Fluidmaster to not shut off completely. It may be some kind of debris.
Turn the shut-off valve to the toilet off. Remove the Fluidmaster by turning the unit in the tank counter-clockwise. Have someone turn on the shut-off valve while holding your hand or a cup over the Fluidmaster base to flush it out.
If that doesn't do it, simply replace the Fluidmaster. They're only about $6 bucks. You probably won't even have to replace the base. Just use the assembly that goes into the tank on the old base. Shouldn't take a minute.
Good Luck!
Mike

Hello: Michael

Water must flow into the over flow tube to fill the bowl or there would not be any water in the bowl. Try pinching off the water tube during fillup and note what happens. The bowl does not fill.

Also, during the flush while the incoming water is attempting to fill the tank, some of that water is also used for the flush cycle. All the water is calculated in the water volume rate, which allows for a total full flush and tank refill. Any part of the cycle that does not work effects how the flush and refill cycles operate.

The adjustable height of the flush valve needs to be set correctly or the valve will not or may not fully shut off. Raise the height so the top of the valve is level to the top of the tank rim, than adjust the water level to the fill line. That should stop the filling cycle as intended and allow the valve to work as designed and normally.

Regards & Good Luck
Sharp Advice
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Personal Reminder:
Buckle Up & Drive Safely.
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Make sure the end of the refill tube is not below the water level in the toilet.

Hello: Michael

Excellent point made by Rainbird. Thanks...:)

One part of the installation process often over looked. The fill hose must not be installed into the over flow tube below the water level. It must be attached to the provided clip and the end of the hose must be above the water level or the problem you are encountering will result.

Install the clip and cut the end of the hose so it is held securely in the clip and not below the water level. When the hose is too long and extends down the over flow tube below the water level, it does not allow the fill valve to completely shut off.

Sharp Advice
Web Site Host & Forums Monitor

Personal Reminder:
Buckle Up & Drive Safely.
"The Life You Save, May Be Your Own."

Good tips I pinched the hose,Raised the hose up above water line and it seems to have stopped dripping.The hose was indeed about 2 inches below the water line.
Thanks a million for all the help my water bill will be less and that is a good thing :D

Easy fix, glad it worked out for you :)