1. What is Total Dynamic Head?

Total Dynamic Head (TDH) is the total equivalent height that a fluid is to be pumped, taking into account friction losses in the pipe. It's a crucial measurement for properly sizing pool pumps and ensuring efficient water circulation.

2. How Does the Calculator Work?

The calculator uses the basic TDH formula:

Where:

• Static Head — The vertical distance from the water surface to the discharge point (in feet)
• Friction Loss — The pressure loss due to water flow through pipes and fittings (in feet)

Explanation: The equation combines the physical lift required with the resistance from the plumbing system to determine the total work the pump must perform.

3. Importance of TDH Calculation

Details: Proper TDH calculation ensures you select a pump with adequate power for your pool system. An undersized pump won't circulate water effectively, while an oversized pump wastes energy and may cause excessive wear.

4. Using the Calculator

Tips:

• Measure static head as the vertical distance from the pool water level to the highest point in your return line
• Friction loss can be calculated separately based on pipe size, length, and flow rate
• All values must be positive numbers

5. Frequently Asked Questions (FAQ)

Q1: What's a typical TDH range for residential pools?
A: Most residential pools have TDH between 40-70 feet, depending on the plumbing configuration.

Q2: How do I determine friction loss?
A: Friction loss depends on pipe diameter, length, number of fittings, and flow rate. You can use friction loss charts or online calculators specific to your plumbing setup.

Q3: Why is TDH important for pump selection?
A: Pump performance curves show flow rate at different TDH values. You need to match your system's TDH to the pump's performance curve.

Q4: Does TDH change with water level?
A: Yes, static head changes with water level, which affects TDH. Always calculate for the lowest expected water level.

Q5: How often should I recalculate TDH?
A: Recalculate if you modify your pool's plumbing system or if you're experiencing circulation problems.