How do you calculate the flow rate of water in a pipe?
If the liquid is flowing through a pipe, the area is A = πr2, where r is the radius of the pipe. For a rectangle, the area is A = wh where w is the width, and h is the height. The flow rate can be measured in meters cubed per second (m3/s), or in liters per second (L/s).
How much water can flow through a 2.5 inch pipe?
Metric PVC Pipe
| Assume Average Pressure. (20-100PSI) About 12f/s flow velocity | ||
|---|---|---|
| 1.5″ | 1.50-1.60″ | 81 gpm |
| 2″ | 1.95-2.05″ | 127 gpm |
| 2.5″ | 2.35-2.45″ | 190 gpm |
| 3″ | 2.90-3.05″ | 273 gpm |
How many GPM can a 1 inch pipe handle?
Water Flow (GPM/GPH) based on Pipe Size and Inside/Outside Diameters
| Assume Average Pressure (20-100PSI). About 12 f/s flow velocity | ||
|---|---|---|
| 1/2″ | 0.5 – 0.6″ | 14 |
| 3/4″ | 0.75 – 0.85″ | 23 |
| 1″ | 1 – 1.03″ | 37 |
| 1-1/4″ | 1.25 – 1.36″ | 62 |
How many GPM can a 3/4 pipe flow?
23 gpm
Metric PVC Pipe
| Assume Average Pressure. (20-100PSI) About 12f/s flow velocity | ||
|---|---|---|
| 1/2″ | .50-.60″ | 14 gpm |
| 3/4″ | .75-.85″ | 23 gpm |
| 1″ | 1.00-1.03″ | 37 gpm |
| 1.25″ | 1.25-1.36″ | 62 gpm |
How much water can flow through a 1.5 inch pipe?
Metric PVC Pipe
| Assume Average Pressure. (20-100PSI) About 12f/s flow velocity | ||
|---|---|---|
| 3/4″ | .75-.85″ | 23 gpm |
| 1″ | 1.00-1.03″ | 37 gpm |
| 1.25″ | 1.25-1.36″ | 62 gpm |
| 1.5″ | 1.50-1.60″ | 81 gpm |
How many GPM can a 1/2 PEX pipe flow?
Pressure Drop Table (psi per 100ft of tubing length)
| Flow rate, GPM | PEX tubing size | |
|---|---|---|
| 1/2″ | 5/8″ | |
| 2.0 | 5.30 | 2.12 |
| 3.0 | 11.0 | 4.36 |
| 4.0 | 18.4 | 7.36 |
How many GPM can a 3/4 PEX pipe flow?
Pressure Drop Table (psi per 100ft of tubing length)
| Flow rate, GPM | PEX tubing size | |
|---|---|---|
| 1/2″ | 3/4″ | |
| 4.0 | 18.4 | 3.53 |
| 5.0 | 27.4 | 5.26 |
| 6.0 | 38.1 | 7.30 |