Water Supplies for Sprinkler Systems

Sprinkler systems may require additional water pressure during a fire. Fire department connections, also called Siamese connections, are located on the outside wall of the building or near the street. Such a connection allows the fire department to connect its pumper directly into the building’s sprinkler system to increase water pressure and add water to the system. In a larger fire with many sprinklers operating, that would help maintain higher pressure to the activated sprinklers. 

The fire department connections must be:

• easily located and accessible for use by the fire department
• clear of debris
• properly connected to the sprinkler system
• maintained in working order at all times

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Fire department connection with caps in place

Fire department connection without caps and a bottle in a hose connection