Which component is responsible for admitting water into the tank until it reaches the full level in a gravity flush toilet?

Which component is responsible for admitting water into the tank until it reaches the full level in a gravity flush toilet?

• A. Ball cock
• B. Fill valve
• C. Flush valve
• D. Overflow tube

Answer: (A)

The fill valve, commonly called the ballcock, is the part that admits water into the tank. It opens to let water in from the supply until the water level rises, and a float mechanism signals the valve to shut off when the full level is reached. This keeps the tank from overfilling and provides the correct amount of water for each flush. The other components serve different roles: the flush valve releases water from the tank during a flush, and the overflow tube provides a path to prevent overflow if the water level gets too high.

The fill valve, commonly called the ballcock, is the part that admits water into the tank. It opens to let water in from the supply until the water level rises, and a float mechanism signals the valve to shut off when the full level is reached. This keeps the tank from overfilling and provides the correct amount of water for each flush. The other components serve different roles: the flush valve releases water from the tank during a flush, and the overflow tube provides a path to prevent overflow if the water level gets too high.