GPM Calculations for Pool Drain – Pipe Sizing by Velocity

User needs GPM for 2", 1.5", 4", 3" pipes at various pressures/grades for pool drain to sewer.

Velocity-Based Sizing (PVC CL200 Assumed)

• 1.5": max 34 GPM
• 2": max 55 GPM
• 4": max 200 GPM

Critical Info Needed

• Pump brand/model (5 HP seems large).
• Pump curve.
• Diagram of system.
• Gravity vs forced main details.

Contact for detailed design.