A Pre-Action fire sprinkler system is a combination of Wet Pipe and Dry Pipe Systems. Water is not stored in the pipes until a fire detection device senses a fire. When a fire is detected, the device opens a valve to let the water in before the sprinkler heads open. When the heads open, the pre-action fire sprinkler system reacts as quickly as a wet pipe system.

Ideal Environments For Pre-Action Sprinkler Systems Include:

Archival Vaults, Fine Art Storage Rooms, Rare Book Libraries, Computer Center, and more. 

Often referred to as open sprinklers, deluge systems deliver large quantities of water over specified areas quickly. Deluge systems connect to a water supply through a deluge valve that opens by a smoke or heat detection system. The detection system is installed in the same area as the sprinklers. When the detection system is activated water discharges through all of the sprinkler heads in the system.

Ideal Environments For Deluge Sprinkler Systems Include:

Power Plants, Aircraft Hangars, Chemical Storage or Processing Facilities, and more. 

FIRE PUMPS are needed when the local municipal water system cannot provide sufficient pressure to meet the hydraulic design requirements of the fire sprinkler system. Low water pressure usually occurs if the building is very tall, such as in high-rise buildings. It can also occur in systems requiring a relatively high terminal pressure at the fire sprinkler to flow a large volume of water, such as in storage warehouses.

TANKS OR RESERVOIRS are holding tanks used to provide water for a sprinkler system that demands more water than the domestic water supply line serving the building can deliver.