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Pump Flow Rate Formula:
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The pump flow rate is the volume of water that a pool pump can circulate per hour. It's a critical factor in maintaining proper water filtration and chemical distribution throughout your pool.
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 specified turnover time.
Details: Correct pump sizing ensures efficient filtration, proper chemical distribution, energy efficiency, and prevents premature pump failure. An oversized pump wastes energy, while an undersized pump fails to maintain water quality.
Tips: Enter pool volume in litres and desired turnover time in hours. Typical turnover times range from 4-8 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 2-4 hour turnover times depending on usage.
Q2: How do I calculate my pool volume?
A: For rectangular pools: Length × Width × Average Depth × 1000. For circular pools: π × Radius² × Average Depth × 1000.
Q3: Should I add a safety factor to the calculated flow rate?
A: Yes, it's recommended to add 10-20% to account for pipe friction, filter resistance, and future equipment additions.
Q4: What's the difference between flow rate and pump size?
A: Flow rate is the volume per hour, while pump size refers to the pump's horsepower rating needed to achieve that flow rate against system resistance.
Q5: Are there Australian standards for pool pumps?
A: Yes, Australian standards recommend specific turnover rates based on pool type and usage. Always consult local regulations and professional pool builders.