Water Flow Rates (GPH) | ||
Pipe Size (ID) | Gravity Drain | Pressure Return |
1/2 Inch | 200 | 1,260 |
3/4 Inch | 400 | 2,160 |
1 Inch | 600 | 3,510 |
1.25 Inch | 1000 | 5,940 |
1.5 Inch | 1400 | 7,560 |
2 Inch | 2200 | 12,000 |
2.5 Inch | 3200 | 17,550 |
These are estimates. Your mileage may vary.