Which device is used to supplement the water flow in an operating sprinkler system?

Which device is used to supplement the water flow in an operating sprinkler system?

• A. Gate valve
• B. Clapper valve
• C. Fire Department Connection
• D. OS and Y valve

Answer: (C)

Fire Department Connection is used to supplement water flow in an operating sprinkler system. It lets firefighters connect hoses from a pumper into the building’s standpipe/sprinkler system, adding extra water and increasing both volume and pressure when the building’s own supply isn’t enough. This external source is usually on the exterior of the building and uses a Siamese-style connection with two inlets so water can be fed into the system quickly during a fire. Other devices shown in options serve different roles: valves like gate or OS&Y valves are used to start, stop, or isolate flow, and a clapper (check) valve prevents backflow. They don’t provide additional firefighting water into the system.

Fire Department Connection is used to supplement water flow in an operating sprinkler system. It lets firefighters connect hoses from a pumper into the building’s standpipe/sprinkler system, adding extra water and increasing both volume and pressure when the building’s own supply isn’t enough. This external source is usually on the exterior of the building and uses a Siamese-style connection with two inlets so water can be fed into the system quickly during a fire. Other devices shown in options serve different roles: valves like gate or OS&Y valves are used to start, stop, or isolate flow, and a clapper (check) valve prevents backflow. They don’t provide additional firefighting water into the system.