1. What is the Hose Monster Pitot Formula?

The Hose Monster pitot formula calculates fire flow from pitot pressure and orifice diameter. It's commonly used in fire service to determine water flow rates during firefighting operations.

2. How Does the Calculator Work?

The calculator uses the Hose Monster formula:

Where:

• \( Flow \) — Fire flow in gallons per minute (gpm)
• \( d \) — Orifice diameter in inches
• \( P \) — Pitot pressure in pounds per square inch (psi)

Explanation: The formula accounts for the relationship between nozzle diameter, water pressure, and resulting flow rate.

3. Importance of Fire Flow Calculation

Details: Accurate flow calculation is crucial for firefighting operations to ensure adequate water supply, proper nozzle selection, and effective fire suppression.

4. Using the Calculator

Tips: Enter orifice diameter in inches and pitot pressure in psi. All values must be valid (diameter > 0, pressure > 0).

5. Frequently Asked Questions (FAQ)

Q1: Why use the Hose Monster formula?
A: It's a reliable, widely-accepted method for calculating fire flows from pitot tube readings.

Q2: What are typical flow rates for firefighting?
A: Typical handlines flow 95-250 gpm, while master streams can flow 350-1000+ gpm depending on diameter and pressure.

Q3: When should pitot pressure be measured?
A: During pump testing, fire flow testing, or when verifying nozzle performance.

Q4: Are there limitations to this formula?
A: Accuracy depends on proper pitot tube placement and assumes standard nozzle designs. May be less accurate for non-standard orifices.

Q5: How does diameter affect flow?
A: Flow increases with the square of the diameter - doubling the diameter quadruples the potential flow at the same pressure.