What is the first thing you must check in order to to report an AFFF "manned and ready"?

What is the first thing you must check in order to to report an AFFF "manned and ready"?

• A. Firemain pressure is at 150 +/-15 psi
• B. TLI is at 95% (it will still operate as long as AFFF is present)
• C. AFFF pump is running
• D. Tank level full

Answer: (A)

The most important thing to verify first is the firemain pressure. The AFFF transfer station depends on a stable firemain supply to feed the pump and properly proportion the foam. The prescribed operating pressure is 150 psi with a tolerance of plus or minus 15 psi. If the pressure is outside that range, you can’t reliably declare the system manned and ready, because insufficient or excessive pressure can prevent proper foam delivery, regardless of other conditions. Only after confirming the firemain is within spec should you check secondary factors like tank level (to ensure there’s enough concentrate), the pump running (to confirm the equipment is active), or other indicators of readiness.

The most important thing to verify first is the firemain pressure. The AFFF transfer station depends on a stable firemain supply to feed the pump and properly proportion the foam. The prescribed operating pressure is 150 psi with a tolerance of plus or minus 15 psi. If the pressure is outside that range, you can’t reliably declare the system manned and ready, because insufficient or excessive pressure can prevent proper foam delivery, regardless of other conditions. Only after confirming the firemain is within spec should you check secondary factors like tank level (to ensure there’s enough concentrate), the pump running (to confirm the equipment is active), or other indicators of readiness.