1. What is the Fire Flow Test?

The Fire Flow Test measures the available water supply for firefighting purposes. It helps determine the water system's capacity to deliver adequate flow at sufficient pressure during fire emergencies.

2. How Does the Calculator Work?

The calculator uses the fire flow test equation:

Where:

• Tested Flow — Measured flow during test (gpm)
• Residual Pressure — Pressure during flow test (psi)
• Static Pressure — Normal system pressure (psi)

Explanation: The equation estimates the available fire flow based on the relationship between pressure and flow in water distribution systems.

3. Importance of Fire Flow Testing

Details: Fire flow testing is essential for fire protection planning, ensuring adequate water supply for firefighting, and verifying hydraulic capacity of water systems.

4. Using the Calculator

Tips: Enter tested flow in gpm, residual pressure in psi, and static pressure in psi. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is a good available fire flow value?
A: Requirements vary by jurisdiction, but typically 500-1500 gpm is needed for residential areas, while commercial areas may require 1500-3500 gpm.

Q2: How often should fire flow tests be conducted?
A: Annually or whenever significant changes occur to the water system. More frequent testing may be needed in areas with variable demand.

Q3: What affects fire flow test results?
A: System demand during testing, pipe condition, elevation changes, and nearby water usage can all impact results.

Q4: What's the difference between static and residual pressure?
A: Static pressure is measured with no water flowing, while residual pressure is measured during flow testing.

Q5: Can this calculator be used for hydrant flow tests?
A: Yes, this equation is commonly used to analyze hydrant flow test results.