What Is The Function Of A Fire Water Tank

Mar 26, 2025

Fire water tanks are divided into dedicated fire water tanks and shared water tanks for living and firefighting according to their usage. Production and fire shared water tanks, as well as living, production, and fire shared water tanks.

Indoor fire water tanks (including water towers and pressurized water tanks) in low rise buildings are water storage devices that store water for firefighting in the early stages of fire fighting. They provide the amount of water needed for firefighting in the early stages and ensure the necessary water pressure for firefighting equipment during firefighting.

The requirements for setting up fire water tanks are:

(1) Set conditions. The outdoor fire water supply system is a building with a constant high pressure water supply system. If the water volume and pressure of the most unfavorable fire hydrants and automatic sprinkler systems in the building can be guaranteed, a fire water tank may not be installed. Buildings with temporary high-pressure water supply systems should be equipped with fire water tanks.

(2) Fire water storage capacity of the water tank. The indoor fire water tank should store 10 minutes of fire water usage (the same applies to pressure water tanks and water towers). When the indoor fire water consumption does not exceed 25L/s and the calculated indoor fire water tank storage capacity exceeds 12m ³, 12m ³ can still be used; When the indoor fire water consumption exceeds 25L/s. After calculation, when the indoor fire water tank storage capacity exceeds 18m ³, 18m ³ can still be used

(3) Set height requirements. The fire water tank should be located at the highest part of the building. And it should be a gravity flow water tank. For buildings with indoor fire water consumption exceeding 5L/s, if the fire water tank cannot meet the water pressure of the most unfavorable point fire extinguishing equipment, pressure boosting facilities such as pneumatic water tanks should be installed.

(4) Requirements for shared water tanks. There should be technical measures in place to ensure that firefighting water is not diverted from water tanks used for both domestic and production purposes.

(5) After a fire occurs, the fire water supplied by the fire pump should not enter the fire water tank to ensure that indoor fire hydrants and automatic sprinkler systems have sufficient water pressure and volume. The fire water tank should be fed into the production or domestic water supply network. On the fire water outlet pipe of the fire water tank. A one-way valve should be installed to allow only water from the water tank to enter the fire pipe network, preventing water from the fire pipe network from entering the water tank.