Freezing water caused burst pipes in a fire suppression system at a private school. A portion of the system is a “dry system” which is located in the unheated areas of the structure and water is introduced automatically only when needed to respond to a fire alarm. Portions of the “dry system” piping were found to be installed without the proper slope to allow the pipes to drain following system tests. The un-drained pipes froze and cracked, allowing air pressure to escape the “dry system” piping, which activated the sprinkler system and inundated the building. Williams & Beck has invested many fire suppression systems including “wet pipe”, “dry pipe” and chemical suppression systems.