The means to fill a steel tank shall be sized to fill within how many hours?

The means to fill a steel tank shall be sized to fill within how many hours?

• A. 12 Hours
• B. 4 Hours
• C. 6 Hours
• D. 8 Hours

Answer: (D)

In designing a fire protection water supply that uses a steel storage tank, the fill path must be able to replenish the tank within eight hours after water has been drawn. This timing keeps the system ready for a renewed demand without requiring an impractically large or fast-fill setup. It balances the practicality and cost of piping, valves, and source capacity with the need to prevent prolonged vulnerability if water is used multiple times or for an extended event. A faster target, like four hours, would push for a much higher fill rate and bigger pipes; a slower target, like twelve hours, could leave the system short on water during ongoing or repeated discharges. Thus eight hours is the standard that fits typical design considerations.

In designing a fire protection water supply that uses a steel storage tank, the fill path must be able to replenish the tank within eight hours after water has been drawn. This timing keeps the system ready for a renewed demand without requiring an impractically large or fast-fill setup. It balances the practicality and cost of piping, valves, and source capacity with the need to prevent prolonged vulnerability if water is used multiple times or for an extended event. A faster target, like four hours, would push for a much higher fill rate and bigger pipes; a slower target, like twelve hours, could leave the system short on water during ongoing or repeated discharges. Thus eight hours is the standard that fits typical design considerations.