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  Fire Sprinklers Wet pipe systems Fire Sprinklers :- Wet pipe systems is the most commonly used fire sprinkler systems. Because it is very reliable and at the same time     simple. Basically it works like- in the event of a fire, water is provided to the piping via the sprinklers heads by an automatic water supply.   Drypipe systems Fire Sprinklers :- It is a     popular   fire sprinkler system   type. They are usually installed in unheated buildings i.e.. Parking     garages for example. Here the low ambient temperature may freeze the water in an ordinary wet pipe system, making it useless. Therefore, in this kind of sprinkler system, the water in the piping is replaced by air at a pressure below the water supply pressure. When one or more of the automatic sprinkler heads is activated, it opens so the air in the piping can come out from that sprinkler. The drop of the air pressure in the piping allows water to vent and control the fire.   Delugesystems Fire Sprinklers :- In this type