What is the maximum flow rate specified for a 2 ½" 200' Pre-Connect with a 1 1/8" SB nozzle at 70 psi?

To determine the maximum flow rate for a 2 ½” pre-connect with a 1 1/8” smooth bore nozzle at 70 psi, it's essential to reference established flow formulas for fire hoses and nozzles. The flow rate can be approximated using the following formula:

Flow (in GPM) = 29.7 × D² × √P

Where:

• D is the diameter of the nozzle in inches (1 1/8" is equivalent to 1.125 inches),

• P is the nozzle pressure in psi (70 psi).

Calculating the flow using the provided values:

1. Calculate D²:

1.125² = 1.265625

2. Apply the values in the flow formula:

Flow = 29.7 × 1.265625 × √70

3. Calculate the square root of 70:

√70 ≈ 8.37

4. Multiply the values:

Flow = 29.7 × 1.265625 × 8.37 ≈ 266 GPM

The answer aligns with the specified maximum flow rate for the configuration described in the question, confirming that the specified maximum flow for a