Abstract: A method and system for controlling bacteria growth in a sprinkler system includes operating a sprinkler network in a normally substantially dry condition, and applying a vacuum apparatus to evacuate air from the network to create a negative air pressure within the network, so that bacteria growth within the network is inhibited. The vacuum is automatically re-applied to the network if the negative air pressure is lost.

Abstract: A method and system for creating a vacuum in a dry sprinkler system to evacuate water when the sprinkler system is inactive and to assist in the quick dispersion of water through the sprinkler system when a fire event occurs are disclosed. A vacuum apparatus establishes a vacuum that is within the design pressure capability of sprinkler drops in the sprinkler system. A pressure regulator monitors the pressure and automatically activates the vacuum apparatus when a vacuum loss is detected. A valve is activated when a fire event occurs so that water is drawn through the sprinkler system quickly.