1. What is the Irrigation Pressure Equation?

The Irrigation Pressure Equation calculates the actual pressure available in an irrigation system by subtracting pressure loss from the source pressure. This helps in designing efficient irrigation systems.

2. How Does the Calculator Work?

The calculator uses the simple equation:

Where:

• \( P \) — System pressure (PSI)
• \( PSI \) — Source pressure (PSI)
• \( Loss \) — Pressure loss in the system (PSI)

Explanation: The equation accounts for pressure drops due to friction, elevation changes, and other factors in the irrigation system.

3. Importance of Pressure Calculation

Details: Accurate pressure calculation is crucial for proper sprinkler operation, uniform water distribution, and efficient system design.

4. Using the Calculator

Tips: Enter source pressure and pressure loss in PSI. Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What causes pressure loss in irrigation systems?
A: Friction in pipes, elevation changes, valves, filters, and other components contribute to pressure loss.

Q2: What is typical residential water pressure?
A: Most homes have 40-60 PSI, but it can vary. Always measure your specific source pressure.

Q3: How much pressure do sprinklers need?
A: Most spray heads need 20-30 PSI, while rotors typically require 30-45 PSI to operate properly.

Q4: What if my calculated pressure is negative?
A: This indicates your pressure loss exceeds your source pressure, meaning the system won't function properly.

Q5: How can I reduce pressure loss?
A: Use larger diameter pipes, minimize pipe length, reduce number of fittings, and choose low-loss components.