Simple Pump flow capacities and pressures.
For Model 100 and 125 pump cylinders with motor.
Flow Capacities and Pressure
1/5 hp with model 100 pump cylinder
| Maximum Total Head |
Flow Rate GPM |
Pump Stroke Setting |
| 240 feet (104 psi) |
1.5 |
5.8" |
| 160 feet (69 psi) |
2.0 |
6.9" |
| 126 feet (54 psi) |
2.0 |
6.9" |
| 92 feet (40 psi) |
2.0 |
6.9" |
| 76 feet (33 psi) |
2.0 |
6.9" |
1/5 hp with model 125 pump cylinder
| Maximum Total Head |
Flow Rate GPM |
Pump Stroke Setting |
| 200 feet (86 psi) |
1.6 |
3.5" |
| 150 feet (65 psi) |
2.1 |
4.6" |
| 123 feet (53 psi) |
2.6 |
5.8" |
| 103 feet (45 psi) |
3.1 |
6.9" |
Notes
100 feet of head equals 43.3 PSI.
Example of total head calculation: The well water level is at 80 feet, the pump is at 100 feet and we want to deliver 30 psi from the pump head. 30 psi = 100/43.3 x 30 = 69 feet of head. Total head = 80 + 69 = 149 feet of total head. From the top chart, choosing the next highest head of 160 feet = 1.0 GPM.
