Water Flow Rates

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.