Toilet pit water level how to adjust the map?

If you want to adjust the water level in the pit, open the tank cover left water inlet valve has a thin leather tube called water pipe, generally inserted in the right side of the drain valve, pull up the right side of the direct pull to the tank on the line. So that the next time in the water in the pit will not be too high water level. If it is to lower the water level in the tank, there is a screw rod at the top of the left water inlet valve, and then twist counterclockwise to lower the level. This will lower the water level in the tank the next time the water comes on.