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Engineering ToolBox > Water Delivery Flow Velocities
As a rule of thumb the following velocities can be used in design of piping and pumping systems for water transport:
| Pipe Dimension | Water | ||
| inches | mm | m/s | ft/s |
| 1 | 25 | 1 | 3.5 |
| 2 | 50 | 1.1 | 3.6 |
| 3 | 75 | 1.15 | 3.8 |
| 4 | 100 | 1.25 | 4 |
| 6 | 150 | 1.5 | 4.7 |
| 8 | 200 | 1.75 | 5.5 |
| 10 | 250 | 2 | 6.5 |
| 12 | 300 | 2.65 | 8.5 |
More about Water Systems, Pumps or Piping Systems.