What Ships and What It Needs to Run
Included: the 35S pump end and its Grundfos motor, factory-assembled as one complete pump.
Single-phase 3-wire builds: control box required, ordered separately. Use the Grundfos SA-SPM6 3-Wire Control Box matched to the motor horsepower; the box for each HP is in the Control Box by Horsepower table under Models & Performance. The 3/4 and 1 HP boxes are sold in packs of ten.
Three-phase builds: magnetic starter or drive required, ordered separately. Wire the motor through a starter or a drive (VFD) rated for its horsepower and voltage.
Drop cable and splice kit: sized to your setting depth and ordered separately.
Genuine Grundfos equipment, factory-new in original packaging — sold and supported by Watermain Supply, an independent industrial supplier.
Models & Performance — Will It Do What You Need?
Each table reads like the curve: the head the pump adds at shut-off, along its curve and at the rated flow of 35 GPM, out to the end of the published curve. Pick a model whose head at your flow covers the pumping level, the pressure you need at the surface (2.31 ft per psi) and pipe friction.
35S · rated 35 GPM · 3/4 to 10 HP · 11 models
| Model |
HP |
0 GPM (Shut-off) |
9.1 GPM |
23 GPM |
35 GPM (Rated) |
45.3 GPM (Max) |
| 35S07-3 |
3/4 |
88 |
84 |
78 |
61 |
45 |
| 35S10-4 |
1 |
119 |
112 |
104 |
82-83 |
61 |
| 35S15-6 |
1-1/2 |
180 |
170 |
157 |
126 |
92 |
| 35S20-8 |
2 |
232 |
226 |
211 |
168 |
124 |
| 35S30-11 |
3 |
320 |
312 |
291 |
232-237 |
173 |
| 35S50-15 |
5 |
440 |
430 |
404 |
327-331 |
244 |
| 35S50-19 |
5 |
552 |
541 |
505 |
407-413 |
301 |
| 35S75-22 |
7-1/2 |
646 |
635 |
599 |
487-490 |
367 |
| 35S75-25 |
7-1/2 |
732 |
719 |
676 |
549-553 |
411 |
| 35S75-28 |
7-1/2 |
820 |
802 |
753 |
611-615 |
455 |
| 35S100-31 |
10 |
908 |
893 |
840 |
687 |
512 |
35S · rated 35 GPM · 10 to 20 HP · 11 models
| Model |
HP |
0 GPM (Shut-off) |
9.1 GPM |
23 GPM |
35 GPM (Rated) |
45.3 GPM (Max) |
| 35S100-34 |
10 |
993 |
976 |
917 |
743 |
556 |
| 35S100-38 |
10 |
1107 |
1087 |
1019 |
824-830 |
613 |
| 35S150-41DS |
15 |
1199 |
1186 |
1118 |
912-914 |
687 |
| 35S150-44DS |
15 |
1290 |
1270 |
1197 |
975-977 |
733 |
| 35S150-47DS |
15 |
1380 |
1354 |
1274 |
1037-1040 |
777 |
| 35S150-50DS |
15 |
1459 |
1437 |
1351 |
1098-1101 |
821 |
| 35S150-53DS |
15 |
1547 |
1521 |
1428 |
1159-1163 |
864 |
| 35S150-56DS |
15 |
1631 |
1603 |
1502 |
1218-1223 |
904 |
| 35S200-60DS |
20 |
1760 |
1732 |
1631 |
1329-1337 |
998 |
| 35S200-64DS |
20 |
1872 |
1843 |
1734 |
1412-1420 |
1057 |
| 35S200-67DS |
20 |
1959 |
1927 |
1812 |
1473-1482 |
1101 |
Total head in feet. The shut-off and flow columns are read from the Grundfos 60 Hz curves, digitized from the published vector curves in the Grundfos SP 35S data sheet (60 Hz), at the nearest published point and rounded down. The (Rated) column is the nominal head Grundfos prints for each model at its rated flow, verbatim; where two figures are shown, builds on different motors or voltages differ slightly. Grundfos's curve and printed table disagree here. 35S: the published curve reads above the printed nominal head at 35 GPM by about 3% of shut-off head on the median model. Both are shown as published; we check your duty point against the curve before you order. 1 ft of head = 0.433 PSI. Full curves are in the product images and on the Data Sheet tab.
Control Box by Horsepower (single-phase 3-wire builds)
| Motor HP |
Volts |
Models |
Standard control box |
| 3/4 HP |
230V |
35S07-3 |
98821632 (10-pack) |
| 1 HP |
230V |
35S10-4 |
98821633 (10-pack) |
| 1-1/2 HP |
230V |
35S15-6 |
98315254 |
| 2 HP |
230V |
35S20-8 |
98315256 |
| 3 HP |
230V |
35S30-11 |
98315258 |
| 5 HP |
230V |
35S50-15, 35S50-19 |
98315260 |
Grundfos US price list, January 2026, p. 48. Every box, Standard and Deluxe, is on our Grundfos SA-SPM6 3-Wire Control Box listing. Three-phase builds need a magnetic starter or drive instead.
What It Delivers on a 30/50 Pressure Switch
Output at 30 and 50 PSI · 1-1/2 HP · 1 model · depths 30 to 60 ft
GPM at 30 PSI (switch cut-in), by depth to water
| Model |
30 ft |
40 ft |
50 ft |
60 ft |
| 35S15-6 |
43.5 |
41.5 |
38.5 |
35.5 |
GPM at 50 PSI (switch cut-out), by depth to water
| Model |
30 ft |
40 ft |
50 ft |
60 ft |
| 35S15-6 |
29 |
24 |
15 |
— |
Output at 30 and 50 PSI · 2 HP · 1 model · depths 60 to 110 ft
GPM at 30 PSI (switch cut-in), by depth to water
| Model |
60 ft |
70 ft |
80 ft |
90 ft |
100 ft |
110 ft |
| 35S20-8 |
44.5 |
42.5 |
41 |
38.5 |
36.5 |
34 |
GPM at 50 PSI (switch cut-out), by depth to water
| Model |
60 ft |
70 ft |
80 ft |
90 ft |
100 ft |
110 ft |
| 35S20-8 |
35 |
32 |
29 |
25 |
19.5 |
10 |
Output at 30 and 50 PSI · 3 HP · 1 model · depths 110 to 200 ft
GPM at 30 PSI (switch cut-in), by depth to water
| Model |
110 ft |
130 ft |
150 ft |
160 ft |
180 ft |
200 ft |
| 35S30-11 |
44.5 |
42 |
39 |
37.5 |
34 |
29.5 |
GPM at 50 PSI (switch cut-out), by depth to water
| Model |
110 ft |
130 ft |
150 ft |
160 ft |
180 ft |
200 ft |
| 35S30-11 |
38 |
34.5 |
30.5 |
28 |
21 |
5 |
Output at 30 and 50 PSI · 5 to 10 HP · 6 models · depths 180 to 750 ft
GPM at 30 PSI (switch cut-in), by depth to water
| Model |
180 ft |
250 ft |
350 ft |
425 ft |
550 ft |
750 ft |
| 35S50-15 |
44.5 |
37.5 |
17 |
— |
— |
— |
| 35S50-19 |
— |
44 |
35.5 |
25 |
— |
— |
| 35S75-22 |
— |
— |
42 |
36 |
17.5 |
— |
| 35S75-25 |
— |
— |
44.5 |
40.5 |
30.5 |
— |
| 35S75-28 |
— |
— |
— |
43.5 |
36 |
— |
| 35S100-31 |
— |
— |
— |
— |
40 |
25.5 |
GPM at 50 PSI (switch cut-out), by depth to water
| Model |
180 ft |
250 ft |
350 ft |
425 ft |
550 ft |
750 ft |
| 35S50-15 |
40 |
31 |
— |
— |
— |
— |
| 35S50-19 |
— |
40.5 |
29.5 |
9 |
— |
— |
| 35S75-22 |
— |
— |
38.5 |
31.5 |
— |
— |
| 35S75-25 |
— |
— |
42 |
37.5 |
24.5 |
— |
| 35S75-28 |
— |
— |
44.5 |
41 |
32.5 |
— |
| 35S100-31 |
— |
— |
— |
44 |
37.5 |
18 |
Output at 30 and 50 PSI · 10 to 15 HP · 6 models · depths 500 to 1300 ft
GPM at 30 PSI (switch cut-in), by depth to water
| Model |
500 ft |
650 ft |
800 ft |
1000 ft |
1150 ft |
1300 ft |
| 35S100-34 |
44.5 |
38 |
28 |
— |
— |
— |
| 35S100-38 |
— |
41.5 |
34.5 |
14.5 |
— |
— |
| 35S150-41DS |
— |
44 |
38.5 |
27.5 |
— |
— |
| 35S150-44DS |
— |
— |
41 |
32 |
20 |
— |
| 35S150-47DS |
— |
— |
42.5 |
35.5 |
27.5 |
2.5 |
| 35S150-50DS |
— |
— |
44 |
37.5 |
31.5 |
21 |
GPM at 50 PSI (switch cut-out), by depth to water
| Model |
500 ft |
650 ft |
800 ft |
1000 ft |
1150 ft |
1300 ft |
| 35S100-34 |
42.5 |
35.5 |
23 |
— |
— |
— |
| 35S100-38 |
45 |
39.5 |
31.5 |
— |
— |
— |
| 35S150-41DS |
— |
42.5 |
36.5 |
23 |
— |
— |
| 35S150-44DS |
— |
44 |
39 |
29.5 |
10.5 |
— |
| 35S150-47DS |
— |
— |
41 |
33 |
23.5 |
— |
| 35S150-50DS |
— |
— |
42.5 |
36 |
29 |
14.5 |
Output at 30 and 50 PSI · 15 to 20 HP · 5 models · depths 800 to 1500 ft
GPM at 30 PSI (switch cut-in), by depth to water
| Model |
800 ft |
950 ft |
1100 ft |
1200 ft |
1350 ft |
1500 ft |
| 35S150-53DS |
45 |
41 |
36.5 |
32.5 |
23.5 |
— |
| 35S150-56DS |
— |
42.5 |
38 |
35 |
28 |
15.5 |
| 35S200-60DS |
— |
44.5 |
41 |
38.5 |
33.5 |
27 |
| 35S200-64DS |
— |
— |
43 |
40.5 |
36.5 |
31.5 |
| 35S200-67DS |
— |
— |
44 |
41.5 |
38 |
33.5 |
GPM at 50 PSI (switch cut-out), by depth to water
| Model |
800 ft |
950 ft |
1100 ft |
1200 ft |
1350 ft |
1500 ft |
| 35S150-53DS |
44 |
39.5 |
34.5 |
30 |
19 |
— |
| 35S150-56DS |
45 |
41 |
36.5 |
33 |
25.5 |
4.5 |
| 35S200-60DS |
— |
43.5 |
40 |
37 |
32 |
24 |
| 35S200-64DS |
— |
45 |
41.5 |
39.5 |
35 |
29.5 |
| 35S200-67DS |
— |
— |
43 |
40.5 |
37 |
32 |
Calculated, not printed: Grundfos publishes no output table for the SP 35S. Each cell is the flow where the published 60 Hz curve meets the depth to water plus 69 ft (30 PSI) or 116 ft (50 PSI), interpolated between published points and rounded down to 0.5 GPM. 35S07-3, 35S10-4 cannot hold 50 PSI from a 20 ft depth on the published curve and are left out. Riser and pipe friction are not included. A dash on the shallow side means the flow runs past the end of the published curve; on the deep side, the pump cannot reach that pressure (or gives under 1 GPM).
For engineering-led sizing and selection support or a factory submittal, email sales@watermainsupply.com or call 1-888.510.4036.
© Watermain Supply — A division of E4 Industrial LLC
