Foam concentrates shall be listed for use with which components?

• A. Only the Water Supply
• B. Foam Concentrate Proportioning Equipment and With the Discharge Devices
• C. Only the Proportioning Equipment
• D. No Listing Required

Answer: (B)

Foam concentrates must be listed for use with both the foam-proportioning equipment and the discharge devices. This ensures the concentrate has been tested for compatibility with how it’s fed into the water stream and with the devices that release the foam solution to the protected area. When a concentrate is listed for both components, the foam solution will mix correctly, maintain stability, and perform as intended through the discharge devices, giving reliable foam generation and drainage. Using a concentrate not listed for both parts can lead to poor foam formation, instability, or clogging, compromising system performance.