Koi Pond Pipe Sizing Calculator
Created by: Ethan Brooks
Last updated:
Estimate recommended pond plumbing diameter from target circulation flow and design velocity.
Koi Pond Pipe Sizing Calculator
KoiEstimate line diameter from flow and velocity targets
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What is a Koi Pond Pipe Sizing Calculator?
A Koi Pond Pipe Sizing Calculator estimates pipe diameter required to carry your target flow at a chosen water velocity.
It helps reduce avoidable head loss and improves pump-efficiency planning in koi circulation systems.
Pipe Sizing Formula
Area Required: Flow Rate ÷ Velocity
Diameter: d = √(4A/π)
Recommended Nominal Size: Nearest practical pipe ID/nominal step above calculated diameter
Frequently Asked Questions
What does this pipe sizing calculator do?
It estimates recommended pipe diameter from target flow and preferred water velocity for koi pond circulation lines.
Why is velocity important?
Too much velocity increases friction loss and pump load; too little can reduce solids transport in some lines.
Is this for suction and return lines?
Yes. You can model either, but desired velocity may differ by line type and plumbing strategy.
What units are used?
Flow is entered in gallons per hour and converted internally to cubic feet per second for hydraulic sizing.
Does this include fittings and head loss?
This tool focuses on diameter selection from flow/velocity. Use pump and head-loss planning tools for full system analysis.
How do I choose final pipe size?
Use this as a baseline, then select nearest practical nominal size while considering layout, fittings, and pump curve.