Alternate Valve Sprinkler Systems

As the name implies, the sprinkler system pipework is charged with water in the summer and with air in the winter when there is a danger of pipework freezing. When the system is charged with air, the operation of one or more sprinklers activates the sprinkler control valve to rapidly allow the flow of water into the sprinkler distribution pipework, where it is discharged through the open sprinklers onto the seat of the fire.