What is the main item that applies to the maintenance of a cold water float operated valve:

• A. Check operation and water level
• B. Replace the float
• C. Calibrate the gauge
• D. Clean the external case

Answer: (A)

The function of a cold water float operated valve is to use a float to regulate the water level in the cistern. The key maintenance action is to verify that the valve operates correctly and that the water level stops at the proper height. By testing the fill cycle—turning the water on and watching the float rise until the valve shuts off—you ensure the system is capable of stopping at the correct level and preventing overflow or under-fill. If the level is off or the valve doesn’t shut off, you adjust the float/arm or inspect for wear that may require replacement. Replacing the float, calibrating a gauge, or cleaning the case are not the primary maintenance steps for ensuring proper operation; they’re separate actions that are only needed if specific problems arise.