Pump Impeller Diameter vs Capacity (\( \frac{D1^3}{D2^3} = \frac{q1}{q2} \)):

Where:

• \( D1 \) is the initial pump diameter, in inches.
• \( D2 \) is the final pump diameter, in inches.
• \( q1 \) is the initial pump capacity, in gallons per minute (gpm).
• \( q2 \) is the final pump capacity, in gallons per minute (gpm).