1. What is a Normal Hose Flow Rate Calculator?

Definition: This calculator estimates the flow rate in gallons per minute (GPM) through a hose based on flow velocity and cross-sectional area.

Purpose: It helps plumbers, irrigation specialists, and homeowners determine water flow for proper system design and troubleshooting.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( Q \) — Flow rate (gallons per minute, GPM)
• \( V \) — Flow velocity (feet per second, ft/s)
• \( A \) — Cross-sectional area (square feet, ft²)
• 448.83 — Conversion factor (ft³/s to GPM)

Explanation: The flow velocity multiplied by the hose area gives volumetric flow in ft³/s, which is then converted to GPM.

3. Importance of Flow Rate Calculation

Details: Proper flow rate estimation ensures adequate water supply, correct pipe sizing, and efficient system performance.

4. Using the Calculator

Tips: Enter the flow velocity (typically 5-10 ft/s for residential systems) and the hose/pipe cross-sectional area. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What's a typical flow velocity for residential hoses?
A: Normal flow velocity ranges from 5-10 ft/s for most residential water systems.

Q2: How do I calculate cross-sectional area?
A: For circular hoses: \( A = \pi \times (diameter/2)^2 \). Convert diameter to feet first.

Q3: Why is the conversion factor 448.83?
A: This converts cubic feet per second to gallons per minute (1 ft³/s = 448.83 GPM).

Q4: What affects flow rate in a hose?
A: Diameter, length, material roughness, pressure, and number of bends/fittings.

Q5: When would I need this calculation?
A: When designing irrigation systems, troubleshooting low water pressure, or selecting pump sizes.