A fire department sprinkler connection typically features how many Siamese connections?

• A. One
• B. Two
• C. Three
• D. Four

Answer: (B)

The key idea is that a fire department sprinkler connection is designed to accept water from the fire department through Siamese adapters to feed the building’s standpipe or sprinkler system. Having two Siamese connections is typical because it lets two separate pumpers connect at once, increasing the overall water flow and providing redundancy. Each Siamese connection takes two 2.5-inch inlets and combines them into the standpipe's main supply, so having two such connections doubles the entry points and helps achieve higher flow quickly, which is especially important for larger buildings or higher-hazard occupancies. Smaller systems may use just one, but two is the common setup for many sprinkler connections.