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THE FEUTEX TOOLKIT

Aquarium Sump Drain-Down Space

Compare sump freeboard with geometric water drain-down during a pump-off scenario.

Aquariums workspace● Runs in your browser
01 Your input
02 Your result
View or copy raw result data
FormulaDrain down = tank_length*tank_width*drop/1000+pipe_volume; Free space = sump_length*sump_width*freeboard/1000; Margin = sump_length*sump_width*freeboard/1000-tank_length*tank_width*drop/1000-pipe_volume

Worked example

Inputs

Tank length
120 cm
Tank width
50 cm
Drop
2 cm
Pipe volume
2 L
Sump length
60 cm
Sump width
35 cm
Freeboard
10 cm

Expected results

Drain down
14 L
Free space
21 L
Margin
7 L

Load the example in the workspace to reproduce these results. Display rounding does not change the underlying calculation.

How to use this tool

  1. Enter the measured quantities and your own planning assumptions.
  2. Review all calculated outputs and the stated limitations.

Try this example

{
  "tank_length": 120,
  "tank_width": 50,
  "drop": 2,
  "pipe_volume": 2,
  "sump_length": 60,
  "sump_width": 35,
  "freeboard": 10
}

Accuracy and scope

Geometric scenario only. Siphons, plumbing, obstructions and real pump-off tests determine actual overflow risk; this is not a safety certification.

Is my data uploaded?

This tool runs locally in your browser. Input and output are not sent to a processing server. Copy or download your result before leaving the page.