Pump Flow Rate Formula:
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The pool pump flow rate is the volume of water that a pump can move per unit of time, typically measured in gallons per hour (GPH). Proper pump sizing is essential for efficient pool circulation and filtration.
The calculator uses the pump flow rate formula:
Where:
Explanation: The formula calculates the minimum flow rate needed to circulate your pool's entire volume within the desired turnover time.
Details: Correct pump sizing ensures efficient filtration, proper chemical distribution, energy efficiency, and prevents equipment damage from overworking or underperforming.
Tips: Enter pool volume in gallons and desired turnover time in hours. Typical turnover times are 6-8 hours for residential pools. All values must be positive numbers.
Q1: What is the ideal turnover time for a pool?
A: For residential pools, 6-8 hours is typical. Commercial pools may require 4-6 hours. Longer turnover times mean slower filtration.
Q2: How do I calculate my pool volume?
A: For rectangular pools: Length × Width × Average Depth × 7.5. For circular pools: π × Radius² × Average Depth × 7.5.
Q3: Should I consider other factors when choosing a pump?
A: Yes, consider pipe size, filter type, number of fittings, and elevation changes which affect total dynamic head (TDH).
Q4: What's the difference between GPH and GPM?
A: GPH is gallons per hour, GPM is gallons per minute. To convert: GPH ÷ 60 = GPM.
Q5: Are variable speed pumps better for Canadian climates?
A: Yes, variable speed pumps are more energy-efficient and allow adjustment for different seasons and usage patterns.