What is the water demand of a water closet tank ballcock?

The water demand of a water closet tank ballcock typically aligns with a flow rate of 3 gallons per minute (gpm). This rate is based on the general design and functionality of modern toilet systems, which are designed to refill quickly while minimizing water consumption for efficiency.

The ballcock mechanism is responsible for regulating the flow of water into the toilet tank after a flush. A flow rate of 3 gpm is sufficient to restore the tank to its full level in a reasonable amount of time, ensuring the toilet is ready for the next use without excessive water waste.

This specification is crucial for understanding plumbing and water supply systems, particularly when sizing pipes or assessing overall water demand in residential or commercial buildings. Recognizing this standard can help in designing systems that meet both performance needs and conservation goals.