The ability of a toilet to flush is determined successfully by the amount of water contained in the tank. Low-flow toilets adjust the mechanics of the toilet bowl to allow a smaller amount of water to clean the toilet. Low-flow and standard toilets must still maintain a specific amount of water in the tank to work properly. The water level has to sit within 1 inch of the top of the overflow pipe. Adjusting the water level is a simple matter of adjusting the float or the float.
TOTO CST743S#01 Drake Round Bowl and Tank, Cotton White
Instructions
1 Remove the lid on the back of the toilet and identify the type of float used in your tank. A ball float is a round ball that connects to the water filling valve through a long, horizontal tube. A flotation cup is a round cylinder wrapped around the filling valve and connected to the tip of the valve through a vertical bar.
2 Adjust the ball float by firmly holding the rod in two hands and bending the rod up or down as necessary. Increasing the water level requires that the float be bent upwards. Let the water fill the tank after adjusting the float to determine if the level is appropriate. Re-adjust as necessary.
3 Adjust the float cup by tightening the adjustment clip on the side of the cylindrical cup that holds the vertical rod against the float cup. Lift the float up or down as desired to adjust the water level. Let the tank filling to test the level. Re-adjust as necessary.
4 Precisely adjust the water level by turning the adjusting screw located at the top, the center of the filling valve. Turning the screw to the right will increase the water level in small increments. The screw can only be adjusted a certain amount before the float locks in place, so only use the adjusting screw for fine adjustment after adjusting the float.