Standard for Installation of Fire Safety Devices based on Use and Occupancy Article 41

The capacity of outdoor fire hydrant equipment shall be not less than the water output of two outdoor fire hydrants discharging simultaneously for 30minutes.Where fire water is used mixed together with common water, necessary measures shall be taken to ensure the capacity of the former water source are in the effective range.Water source for fire extinguisher may be equipped together with water sources for other fire extinguishing equipments, but the total capacity shall be not less than the sum of the necessary water quantity of each fire extinguishing equipment.
中文原文 各類場所消防安全設備設置標準第41條
室外消防栓設備之水源容量,應在二具室外消防栓同時放水三十分鐘之水量以上。
消防用水與普通用水合併使用者,應採取必要措施,確保前項水源容量,在有效水量範圍內。
第一項水源得與其他滅火設備併設。
但其總容量應在各滅火設備應設水量之合計以上。

English translation for reference only; the Chinese text prevails. Not legal advice.