1. What is the GPH to PSI Conversion?

The GPH to PSI conversion calculates water pressure (PSI) from flow rate (GPH), head height (ft), and pump efficiency. This is important for designing and analyzing water systems.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( GPH \) — Gallons per hour flow rate
• \( Head \) — Vertical height in feet
• \( Efficiency \) — Pump efficiency (0-1 decimal)
• 3960 — Conversion constant

Explanation: The formula converts flow rate and head height to pressure, accounting for pump efficiency.

3. Importance of PSI Calculation

Details: Accurate PSI calculation is crucial for designing water systems, selecting appropriate pumps, and ensuring proper system performance.

4. Using the Calculator

Tips: Enter GPH (must be >0), Head in feet (must be >0), and Efficiency as decimal between 0.0001 and 1.0 (default is 0.85 for 85% efficiency).

5. Frequently Asked Questions (FAQ)

Q1: What is a typical pump efficiency value?
A: Most pumps operate between 50-85% efficiency. 0.85 is a common default value for reasonable efficiency.

Q2: Why is the constant 3960 used?
A: This constant combines unit conversions and the weight of water (8.34 lbs/gal) with the conversion from foot-pounds to psi.

Q3: Does this work for any liquid?
A: This specific formula is for water. Other liquids would require adjusting for their specific gravity.

Q4: What if I know GPM instead of GPH?
A: Convert GPM to GPH by multiplying by 60 (since there are 60 minutes in an hour).

Q5: How accurate is this calculation?
A: It provides a theoretical value. Actual system pressure may vary due to friction losses, pipe diameter, and other factors.