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Pipe Size Flow Chart
This chart is for general reference only. Consult the pipe manufacturer specifications for your pipes true flow.
The maximum flow for the pipe size is indicated, to keep the velocity below five feet per second (ft/sec) maximum.
GPM = (Velocity [ft/sec] x Inside Diameter (inches) / 0.4085
| Inside Diameter of Pipe | Water Flow in GPM |
|---|---|
| 0.5 | 4.5 |
| 0.75 | 8 |
| 1 | 13 |
| 1.25 | 23 |
| 1.5 | 31 |
| 2 | 52 |
| 2.5 | 73 |
| 3 | 113 |
| 4 | 192 |
| 5 | 306 |
| 6 | 445 |
| 8 | 772 |
Check out the reference section of our catalog for a more detailed listing!
