A fire reservoir is an artificial water storage facility designed for fixed or mobile fire pumps to draw water from.

When any of the following conditions are met: the municipal water supply network or the main incoming pipe does not meet the design flow rate for indoor and outdoor fire protection water supply; a single fire protection water supply line is used or there is only one main incoming pipe, with the design flow rate of outdoor fire hydrants exceeding 20L/s or the building height exceeding 50m; or the municipal fire protection water supply design flow rate is less than the building's indoor and outdoor fire protection water supply design flow rate, a fire protection reservoir should be set up.

Any that meet the following regulations should have a fire reservoir set up.

1. When the volume of production and domestic water usage is substantial, the municipal water supply network or the main supply pipeline may not meet the design flow rates for indoor and outdoor fire protection water supply.

2. When a single fire water supply line is used or there is only one main water intake pipe, and the outdoor fire hydrant design flow rate exceeds 20 L/s or the building height is greater than 50 meters;

3. The municipal fire water supply design flow is less than the building's indoor and outdoor fire water supply design flow.