When servicing a float-controlled valve, why should you not adjust the float ball by bending the float arm?

Adjusting the float ball by bending the float arm can lead to improper functioning of the float-controlled valve. When the float arm is bent, it alters the angle at which the float ball operates, potentially causing the float to sit too high or low in the water. This misalignment can prevent the float from rising or falling as needed to effectively control the valve, leading to a situation where the tank may not fill or empty properly.

If the float is calibrated incorrectly due to bending the arm, it might not trigger the shut-off mechanism of the valve at the appropriate water level. This could result in overfilling the tank, causing an overflow situation. Proper adjustment should always be done carefully, typically by adjusting the length of the float arm or other mechanisms in place rather than bending it, to ensure efficient and safe operation of the valve and prevent water damage or waste.