Should fire water be injected before the first fire or after the second fire?

The capacity of the fire-fighting pool is larger than that of the fire-fighting tank. The fire-fighting tank is upstairs and the pool is downstairs. "

In some cases, the pool can also be "upstairs", which is not absolute. For example, the Guangzhou TV Tower (Xiaomanyao), known as the tallest TV tower in China, has a main height of 454 meters and a height of 443.6 meters, with a 540m3 high-level fire-fighting pool and fire-fighting water tank: it is generally installed in the roof water tank room. Conventionally used for pressurization and water conservation of fire fighting system, a small amount of water shortage is supplemented to the fire fighting pipeline system through the pressure stabilizing pump to keep the fire fighting pipeline system at constant pressure. When a large amount of water is lost, the fire pump is started. However, the fire water tank will also reserve some water for fire emergency, and this water will generally flow into the pipeline through gravity flow or pressure stabilizing pump. Fire-fighting pool: In case of fire, the fire-fighting pipeline system needs to put out the fire, which requires a lot of water, and the water storage in the fire-fighting water tank is far from enough. This means that the fire pump directly draws water from the fire pool and supplies water to the pipeline system to extinguish the fire. Fire pool is to provide each or all fire water during the whole fire process, which is generally set in the basement or buried underground. The fire pump draws water from the fire pool to supply water to the fire fighting system. If the municipal water supply system cannot meet the fire water consumption and water pressure, a complete fire water supply system is: fire water tank-fire water supply pipe network-fire pump-fire pool.