Find your horsepower in the row, then read across. Total head is the lift from the pumping water level to the discharge, plus the pressure you want at the tank (2.31 ft for every PSI), plus friction in the drop pipe.
Total head in feet
| HP |
0 GPM (Shut-off) |
5 GPM |
10 GPM |
15 GPM |
20 GPM (Max) |
| 1/2 HP |
220 ft |
202 ft |
160 ft |
96 ft |
10 ft |
| 3/4 HP |
316 ft |
293 ft |
234 ft |
140 ft |
11 ft |
| 1 HP |
379 ft |
345 ft |
272 ft |
158 ft |
5 ft |
| 1 1/2 HP |
543 ft |
503 ft |
399 ft |
234 ft |
7 ft |
| 2 HP |
639 ft |
591 ft |
470 ft |
275 ft |
8 ft |
| 3 HP |
862 ft |
798 ft |
639 ft |
365 ft |
23 ft |
| 5 HP |
1340 ft |
1240 ft |
994 ft |
567 ft |
35 ft |
Read from the published curve in the Pumps by Baker catalog (Sept 2025, rev 3/26), p. 72, digitized and rounded down, at the flows nearest 20%, 50% and 75% of the curve’s 20 GPM end. 0 GPM is the printed shut-off.
Output in GPM at 30 PSI (switch cut-in), by depth to water
| HP |
25 ft |
50 ft |
100 ft |
150 ft |
200 ft |
250 ft |
300 ft |
| 1/2 HP |
15.1 |
13.4 |
9.1 |
— |
— |
— |
— |
| 3/4 HP |
16.9 |
15.9 |
13.6 |
10.9 |
7.3 |
— |
— |
| 1 HP |
17.2 |
16.4 |
14.6 |
12.5 |
10.1 |
7.1 |
2.1 |
| 1 1/2 HP |
— |
17.7 |
16.6 |
15.4 |
14.1 |
12.6 |
11.1 |
| 2 HP |
— |
18.1 |
17.1 |
16.2 |
15.1 |
14.0 |
12.8 |
| 3 HP |
— |
18.6 |
17.9 |
17.2 |
16.4 |
15.7 |
14.9 |
| 5 HP |
— |
19.2 |
18.7 |
18.3 |
17.8 |
17.4 |
16.9 |
Output in GPM at 50 PSI (switch cut-out), by depth to water
| HP |
25 ft |
50 ft |
100 ft |
150 ft |
200 ft |
250 ft |
300 ft |
| 1/2 HP |
11.7 |
9.5 |
— |
— |
— |
— |
— |
| 3/4 HP |
14.9 |
13.8 |
11.1 |
7.6 |
— |
— |
— |
| 1 HP |
15.6 |
14.7 |
12.7 |
10.3 |
7.3 |
2.7 |
— |
| 1 1/2 HP |
— |
16.6 |
15.5 |
14.2 |
12.8 |
11.2 |
9.4 |
| 2 HP |
— |
17.2 |
16.2 |
15.2 |
14.1 |
12.9 |
11.6 |
| 3 HP |
— |
17.9 |
17.2 |
16.5 |
15.8 |
15.0 |
14.2 |
| 5 HP |
— |
18.8 |
18.3 |
17.9 |
17.4 |
16.9 |
16.5 |
Output tables as printed in the Pumps by Baker catalog (Sept 2025, rev 3/26), pp. 71-72, at the 30 and 50 PSI rows. Riser-pipe friction is not included (manufacturer note): add it for long or small drop pipe. — marks a point A.Y. McDonald does not print for that horsepower.
Baker 4 in motor by horsepower (230V unless marked, ordered separately)
| HP |
Motor |
| 1/2 HP |
2-wire 3132-005 · 3-wire 3132-004 · 3Ph 3132-525 |
| 3/4 HP |
2-wire 3132-006 · 3-wire 3132-000 · 3Ph 3132-527 |
| 1 HP |
2-wire 3132-007 · 3-wire 3132-001 · 3Ph 3132-529 |
| 1 1/2 HP |
2-wire 3132-009 · 3-wire 3132-002 · 3Ph 3132-531 |
| 2 HP |
3-wire 3132-510 · 3Ph 3132-534 |
| 3 HP |
3-wire 3132-512 · 3Ph 3132-514 |
| 5 HP |
3-wire 3132-513 · 3Ph 3132-517 |
Best operating range: the published curve shades the most efficient operating range for each model; the catalog prints no figures for it. The curve is in the image gallery.
