When all is well, the water level in your toilet bowl is regulated by the level in the tank and toilet's internal S-trap. When the suction that empties the bowl during a .
Solutions for too much water in the toilet bowl. Toilet Bowl Test: Check bowl water level by flushing toilet. If bowl. Adjusting the Roller Clamp: Watch this video .
The water level should be about a half inch below the top of the fill tube. To adjust the tank's water level, first adjust the fill valve. This is done by moving the float that's attached to the valve in the direction you want the water level to go, so raising it raises water levels and vice versa.