Pump Speed vs Head (\( \frac{N1^2}{N2^2} = \frac{H1}{H2} \)):

Where:

• \( N1 \) is the initial pump speed, in revolutions per minute (rpm).
• \( N2 \) is the final pump speed, in revolutions per minute (rpm).
• \( H1 \) is the initial pump head, in feet (ft).
• \( H2 \) is the final pump head, in feet (ft).