What is the outside hose allowance value in gallons per minute for the forward flow test?

What is the outside hose allowance value in gallons per minute for the forward flow test?

• A. 200 gpm
• B. 250 gpm
• C. 300 gpm
• D. 350 gpm

Answer: (B)

In a forward-flow test for water-based systems, the outside hose allowance is the fixed amount of flow you must include to represent a live external hose stream that could be drawing water during a fire event. This allowance ensures the test accounts for the additional demand an exterior attack line would place on the system, giving a realistic check of the supply capability. The standard value used for this outside hose allowance is 250 gpm. This specific figure is the accepted fixed allowance in the testing protocol, so you plan the test to cover the base flow plus 250 gpm for the exterior hose. The other options do not match the standard allowance and would not correctly reflect the expected external hose demand.

In a forward-flow test for water-based systems, the outside hose allowance is the fixed amount of flow you must include to represent a live external hose stream that could be drawing water during a fire event. This allowance ensures the test accounts for the additional demand an exterior attack line would place on the system, giving a realistic check of the supply capability.

The standard value used for this outside hose allowance is 250 gpm. This specific figure is the accepted fixed allowance in the testing protocol, so you plan the test to cover the base flow plus 250 gpm for the exterior hose. The other options do not match the standard allowance and would not correctly reflect the expected external hose demand.