Water Feature Flow Calculator
Calculate pump size, pipe diameter, and flow rate for waterfalls, fountains, and sheer descent water features.
Inputs
in
ft
Results
Required Flow Rate
2,400 GPH
Recommended Pump Size
2,880 GPH
Pipe Diameter2 in
Total Head (with friction)3.9 ft
Monthly Electric Cost$22.46
How to Use This Calculator
- Select the feature type: 1 = sheer descent/spillover, 2 = waterfall, or 3 = fountain/bubbler.
- Enter the spill width in inches — the width of the water curtain or lip that water flows over.
- Set the drop height in feet and the desired water thickness in inches for the visual effect you want.
- Review Required GPH to select a pump rated at or above that flow rate at the operating head.
- Check Pipe Diameter and Head Loss to ensure your plumbing can deliver adequate pressure.
- Use Monthly Electric Cost to evaluate the long-term operating expense of running the feature.
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