What information should be included in system drawings for foam-water systems?

• A. Only electrical panels.
• B. Locations of foam concentrate storage, piping, proportioning devices, discharge points, and control devices.
• C. Only general alarm locations.
• D. Only roof locations.

Answer: (B)

The key idea is that foam-water system drawings must be comprehensive, showing every major component that makes the system work and how it connects. Specifically, the drawings should mark where the foam concentrate is stored, how that concentrate is piped into the system, the proportioning devices that mix foam concentrate with water, where the foam-water will be discharged, and all control devices that operate or monitor the system. Having this complete picture lets installers, inspectors, and operators verify correct sizing, routing, presence of interlocks or alarms, and proper discharge locations, which are essential for reliable foam deployment. Points about only electrical panels or only alarm locations or only roof locations miss critical parts of the system and wouldn’t support proper installation or operation.