sprinkler system freeze
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The dangers of a sprinkler system freezing is. Wet pipe fire sprinkler systems are at risk of freezing in the cold weather because they are constantly filled with water. When the temperatures drop and the water freezes this will cause a lot of damage. The frozen water will either expand and break the fire sprinkler piping or it will create an ice plug.
Drain the pipes: Now you need to remove the water from the pipes and sprinklers so that it wont freeze/expand and break the pipe. There are several ways to drain your pipes: a manual drain valve, an automatic drain valve or the compressed air blow-out method.