The fire sprinkler system is an active fire protection method, which consists of a water supply system, providing adequate pressure and discharge to the water distribution piping system, to which fire sprinklers are connected


Each closed sprinkler is covered with a heat sensitive glass ball or a two-part metal joint that is joined to a fusible alloy. The glass ball or link puts pressure on the pipe cap which acts as a plug that prevents water from flowing to the ambient temperature around the sprinkler reaching the design activation temperature of each sprinkler head. In a standard wet pipe sprinkler system, each sprinkler is active independently when a predetermined heat level is reached. Thus, only sprinklers near the fire will operate, usually only one or two. This maximizes water pressure above the origin of the fire, and minimizes water damage to the building edit button 

Activation of the sprinkler will reduce water damage compared to the flow of the fire hose, which provides about 900 liters / minute (250 US gallons / minute). Typical sprinklers used for manufacturing industry residents spend around 75-150 liters / minute (20-40 US gallons / minute). However, a typical Fast Suppression Fast Response (ESFR) sprinkler at a pressure of 50 psi (340 kPa) will issue around 380 liters per minute (100 US gal / minute). In addition, sprinklers will usually be active in one to four minutes from the start of the fire, whereas it usually takes at least five minutes for the fire department to register an alarm and go to the fire location, and an additional ten minutes to prepare the equipment and apply the hose flow to the fire. This extra time can produce a much larger fire, requiring more water to extinguish it.


Wet pipe sprinkler systems are installed more often than all other types of fire sprinkler systems. They also are the most reliable, because they are simple, with the only operating components being the automatic sprinklers and (commonly, but not always) the automatic alarm check valve. An automatic water supply provides water under pressure to the system piping.