Grundfos · Submersible Well Pump
160S SP
160 GPM class stainless steel submersible well pump for 6 in and larger wells: 47 complete builds from 2 HP to 75 HP on 4 in, 6 in and 8 in Grundfos motors, with a 3 in NPT discharge.
160 GPM Rated Flow
2-75 HP
39-1,584 ft Nominal Head
1 to 39 Stages
3 in NPT Discharge
6 in Min. Well
230V 1Ph · 230V and 460V 3Ph
AISI 304 Stainless Steel
cCSAus
5.3-7.6 in Dia x 33.7-226.0 in L
52.0-716.9 lb Weight
Overview
The Grundfos 160S is the 160 GPM class of the Grundfos SP submersible range, built for 6 in and larger wells. Pump and impellers are AISI 304 stainless steel. Each build here is a complete pump: the 160S pump end and a Grundfos submersible motor, supplied together under one part number, with a 3 in NPT discharge.
Typical uses listed by Grundfos include groundwater supply, irrigation, residential water pressure boosting and municipal wells.
Builds from 2 HP to 7-1/2 HP run on a 4 in Grundfos MS4000 motor. The 160S75-4 and 160S100-5 come on a 4 in MS4000 or a 6 in MS6000C motor, and 15 HP to 40 HP run on the 6 in MS6000C. The 50 HP and 60 HP builds on a 6 in motor use the Grundfos MMS6, and the largest builds (160S600-33, -36 and 160S750-39) use the 8 in MMS8000. The 160S500-29, 160S600-31, -33, -36 and 160S750-39 are built into a stainless steel sleeve with an NPT male discharge.
The two single-phase builds (160S20-1 at 2 HP and 160S50-2 at 5 HP, 230V) use a 3-wire motor and run through a Grundfos control box, sold separately. Three-phase builds are available at 230V or 460V.
Genuine Grundfos equipment, factory-new in original packaging — sold and supported by Watermain Supply, an independent industrial supplier.
Warranty
24 months from date of installation, but not more than 30 months from date of manufacture. In Grundfos's words, products are “warranted to the original user only to be free of defects in material and workmanship”; the full terms are in the installation and operating instructions on the Data Sheet tab.
Single Pump or a Set?
Each 160S serves one well as a single unit. For a duty/standby pair across two wells, or a flow outside what one 160S carries, send us the duty: the 90S covers lower flows, and the 230S/240S and 300S cover higher flows in the same 6 in well range, and we will size the set with you.
Check the Part Number
The model code reads flow class, horsepower and stages: 160S150-6 is the 160S with a 15 HP motor and 6 stages. The same model can come in more than one build, so order by part number. In the selector, choose horsepower and motor size first, then voltage and phase (the button shows the wiring and whether a control box or starter is needed), then the model and stage count. The part number for every build is in the Models & Ratings table.
-
160S75-4 and 160S100-5 come on more than one motor size (4 in and 6 in). Each build has its own part number and pump end.
-
160S500-29, 160S600-31, -33, -36 and 160S750-39 are sleeve builds with an NPT male discharge and need an 8 in or larger well.
Models & Ratings
| Model |
Part No. |
HP |
Voltage |
Motor |
Motor Part No. |
Pump End Part No. |
Control Box |
| 160S20-1 |
93143919 |
2 |
230V 1Ph |
MS4000 4 in |
92959989 |
93138223 |
98315256 |
| 160S50-2 |
93143930 |
5 |
230V 1Ph |
MS4000 4 in |
92959991 |
92910844 |
98315260 |
| 160S50-2 |
93143931 |
5 |
230V 3Ph |
MS4000 4 in |
92959951 |
92910844 |
— |
| 160S50-2 |
93158705 |
5 |
460V 3Ph |
MS4000 4 in |
92959960 |
92910844 |
— |
| 160S75-3 |
93143932 |
7-1/2 |
230V 3Ph |
MS4000 4 in |
92959954 |
93138224 |
— |
| 160S75-4 |
93143934 |
7-1/2 |
230V 3Ph |
MS6000C 6 in |
96166181 |
92910845 |
— |
| 160S75-3 |
93143951 |
7-1/2 |
460V 3Ph |
MS4000 4 in |
92959963 |
93138224 |
— |
| 160S75-4 |
93143952 |
7-1/2 |
460V 3Ph |
MS4000 4 in |
92959963 |
92910850 |
— |
| 160S75-4 |
93143954 |
7-1/2 |
460V 3Ph |
MS6000C 6 in |
96166161 |
92910845 |
— |
| 160S100-5 |
93143935 |
10 |
230V 3Ph |
MS6000C 6 in |
96166182 |
92910843 |
— |
| 160S100-5 |
93143953 |
10 |
460V 3Ph |
MS4000 4 in |
92959987 |
93138225 |
— |
| 160S100-5 |
93143955 |
10 |
460V 3Ph |
MS6000C 6 in |
96166162 |
92910843 |
— |
| 160S150-6 |
93143936 |
15 |
230V 3Ph |
MS6000C 6 in |
96166184 |
93138226 |
— |
| 160S150-7 |
93143937 |
15 |
230V 3Ph |
MS6000C 6 in |
96166184 |
93138227 |
— |
| 160S150-8 |
93143938 |
15 |
230V 3Ph |
MS6000C 6 in |
96166184 |
92910840 |
— |
| 160S150-9 |
93143940 |
15 |
230V 3Ph |
MS6000C 6 in |
96166184 |
93138228 |
— |
| 160S150-6 |
93143956 |
15 |
460V 3Ph |
MS6000C 6 in |
96166164 |
93138226 |
— |
| 160S150-7 |
93143957 |
15 |
460V 3Ph |
MS6000C 6 in |
96166164 |
93138227 |
— |
| 160S150-8 |
93143958 |
15 |
460V 3Ph |
MS6000C 6 in |
96166164 |
92910840 |
— |
| 160S150-9 |
93143959 |
15 |
460V 3Ph |
MS6000C 6 in |
96166164 |
93138228 |
— |
| 160S200-10 |
93143941 |
20 |
230V 3Ph |
MS6000C 6 in |
96166186 |
93138229 |
— |
| 160S200-11 |
93143942 |
20 |
230V 3Ph |
MS6000C 6 in |
96166186 |
93138240 |
— |
| 160S200-12 |
93143943 |
20 |
230V 3Ph |
MS6000C 6 in |
96166186 |
93138241 |
— |
| 160S200-10 |
93143960 |
20 |
460V 3Ph |
MS6000C 6 in |
96166166 |
93138229 |
— |
| 160S200-11 |
93143961 |
20 |
460V 3Ph |
MS6000C 6 in |
96166166 |
93138240 |
— |
| 160S200-12 |
93143962 |
20 |
460V 3Ph |
MS6000C 6 in |
96166166 |
93138241 |
— |
| 160S250-13 |
93143944 |
25 |
230V 3Ph |
MS6000C 6 in |
96166187 |
93138243 |
— |
| 160S250-14 |
93143946 |
25 |
230V 3Ph |
MS6000C 6 in |
96166187 |
93138244 |
— |
| 160S250-15 |
93143947 |
25 |
230V 3Ph |
MS6000C 6 in |
96166187 |
93138245 |
— |
| 160S250-13 |
93143963 |
25 |
460V 3Ph |
MS6000C 6 in |
96166167 |
93138243 |
— |
| 160S250-14 |
93143964 |
25 |
460V 3Ph |
MS6000C 6 in |
96166167 |
93138244 |
— |
| 160S250-15 |
93143965 |
25 |
460V 3Ph |
MS6000C 6 in |
96166167 |
93138245 |
— |
| 160S300-16 |
93143948 |
30 |
230V 3Ph |
MS6000C 6 in |
96166188 |
93138246 |
— |
| 160S300-17 |
93143949 |
30 |
230V 3Ph |
MS6000C 6 in |
96166188 |
93138247 |
— |
| 160S300-18 |
93143950 |
30 |
230V 3Ph |
MS6000C 6 in |
96166188 |
93138248 |
— |
| 160S300-16 |
93143966 |
30 |
460V 3Ph |
MS6000C 6 in |
96166168 |
93138246 |
— |
| 160S300-17 |
93143967 |
30 |
460V 3Ph |
MS6000C 6 in |
96166168 |
93138247 |
— |
| 160S300-18 |
93143968 |
30 |
460V 3Ph |
MS6000C 6 in |
96166168 |
93138248 |
— |
| 160S400-20 |
93143969 |
40 |
460V 3Ph |
MS6000C 6 in |
96166170 |
93138249 |
— |
| 160S400-22 |
93143970 |
40 |
460V 3Ph |
MS6000C 6 in |
96166170 |
93138250 |
— |
| 160S400-24 |
93143971 |
40 |
460V 3Ph |
MMS6 6 in |
99600226 |
93138251 |
— |
| 160S500-28 |
93143972 |
50 |
460V 3Ph |
MMS6 6 in |
99600226 |
93138253 |
— |
| 160S500-29 |
93143973 |
50 |
460V 3Ph |
MMS6 6 in |
99600226 |
93138254 |
— |
| 160S600-31 |
93143974 |
60 |
460V 3Ph |
MMS6 6 in |
99673485 |
93138255 |
— |
| 160S600-33 |
93143975 |
60 |
460V 3Ph |
MMS8000 8 in |
99973363 |
93138256 |
— |
| 160S600-36 |
93143976 |
60 |
460V 3Ph |
MMS8000 8 in |
99973363 |
93138257 |
— |
| 160S750-39 |
93143977 |
75 |
460V 3Ph |
MMS8000 8 in |
99973364 |
93138258 |
— |
Part numbers, motors, pump ends and control boxes: Grundfos US price list, effective January 1, 2026. Control boxes apply to single-phase builds only and are sold separately.
Shared Specifications
| Specification |
Value |
| Rated flow |
160 GPM |
| Horsepower |
2 to 75 HP |
| Stages |
1 to 39 |
| Discharge |
3 in NPT female; 3 in NPT male on the 160S500-29, 160S600-31, -33, -36 and 160S750-39 |
| Minimum well size |
6 in; 8 in for the 160S500-29, 160S600-31, -33, -36 and 160S750-39 |
| Voltage and phase |
230V 1Ph (2-5 HP, 3-wire); 230V 3Ph (5-30 HP); 460V 3Ph (5-75 HP) |
| Motors |
4 in Grundfos MS4000 (2-10 HP); 6 in Grundfos MS6000C (7-1/2-40 HP); 6 in Grundfos MMS6 (40-60 HP); 8 in Grundfos MMS8000 (60-75 HP) |
| Liquid temperature |
MS4000 4 in: up to 104°F (40°C); MS6000C 6 in: up to 104°F (40°C); MMS6 6 in (160S600-31): up to 104°F (40°C) with 1.6 ft/s flow past the motor; MMS6 6 in (160S500-28 and -29): up to 122°F (50°C) with 1.6 ft/s flow past the motor; MMS8000 8 in: up to 113°F (45°C) with 1.6 ft/s flow past the motor |
| Approvals |
cCSAus on every build listed by Grundfos; the non-sleeve builds also carry CULDWUS (Grundfos Product Center codes) |
| Curve tolerance |
ISO 9906 |
| Minimum submergence |
5 ft |
| Included |
Pump end and motor, assembled as one complete pump |
Performance — Will It Do What You Need?
Every 160S is rated at 160 GPM. The figure below is the nominal head Grundfos publishes for each model at that rated flow: the total head the pump adds, in feet. Pick a model whose nominal head covers your pumping level plus the pressure you need at the surface (2.31 ft per psi) plus pipe friction.
| Model |
Stages |
HP |
Nominal Head at 160 GPM, ft |
| 160S20-1 |
1 |
2 |
39 |
| 160S50-2 |
2 |
5 |
78-79 |
| 160S75-3 |
3 |
7-1/2 |
118 |
| 160S75-4 |
4 |
7-1/2 |
154-156 |
| 160S100-5 |
5 |
10 |
195-196 |
| 160S150-6 |
6 |
15 |
238-239 |
| 160S150-7 |
7 |
15 |
276-277 |
| 160S150-8 |
8 |
15 |
313-314 |
| 160S150-9 |
9 |
15 |
357-359 |
| 160S200-10 |
10 |
20 |
395-397 |
| 160S200-11 |
11 |
20 |
431-435 |
| 160S200-12 |
12 |
20 |
477-479 |
| 160S250-13 |
13 |
25 |
514-517 |
| 160S250-14 |
14 |
25 |
550-554 |
| 160S250-15 |
15 |
25 |
592-596 |
| 160S300-16 |
16 |
30 |
628-633 |
| 160S300-17 |
17 |
30 |
664-670 |
| 160S300-18 |
18 |
30 |
721 |
| 160S400-20 |
20 |
40 |
797 |
| 160S400-22 |
22 |
40 |
871 |
| 160S400-24 |
24 |
40 |
954 |
| 160S500-28 |
28 |
50 |
1,100 |
| 160S500-29 |
29 |
50 |
1,131 |
| 160S600-31 |
31 |
60 |
1,209 |
| 160S600-33 |
33 |
60 |
1,332 |
| 160S600-36 |
36 |
60 |
1,467 |
| 160S750-39 |
39 |
75 |
1,584 |
Source: Grundfos SP data booklet, 60 Hz, May 2026 (SP 160S tables). Where two figures are shown, the builds on different motors or voltages differ slightly. Performance conforms to ISO 9906. For flows other than 160 GPM, read the full 160S curve in the data sheet on the Data Sheet tab.
Dimensions & Weights
| Model |
Motor |
Overall Length, in |
Max. Diameter, in |
Net Weight, lb |
| 160S20-1 |
4 in |
33.7 |
5.3 |
52.0 |
| 160S50-2 |
4 in |
40.6-44.5 |
5.3 |
65.1-76.2 |
| 160S75-3 |
4 in |
48.3 |
5.3 |
80.4 |
| 160S75-4 |
4 in |
52.1 |
5.3 |
84.7 |
| 160S75-4 |
6 in |
49.7 |
5.6 |
109.9 |
| 160S100-5 |
4 in |
59.8 |
5.3 |
97.8 |
| 160S100-5 |
6 in |
54.6 |
5.6 |
120.8 |
| 160S150-6 |
6 in |
60.8 |
5.6 |
144.9 |
| 160S150-7 |
6 in |
64.6 |
5.6 |
149.2 |
| 160S150-8 |
6 in |
68.3 |
5.6 |
153.5 |
| 160S150-9 |
6 in |
72.1 |
5.6 |
157.8 |
| 160S200-10 |
6 in |
78.5 |
5.6 |
177.5 |
| 160S200-11 |
6 in |
82.2 |
5.6 |
181.7 |
| 160S200-12 |
6 in |
86.0 |
5.6 |
186.0 |
| 160S250-13 |
6 in |
92.0 |
5.6 |
200.2 |
| 160S250-14 |
6 in |
95.7 |
5.6 |
204.5 |
| 160S250-15 |
6 in |
99.5 |
5.6 |
208.8 |
| 160S300-16 |
6 in |
105.7 |
5.6 |
228.5 |
| 160S300-17 |
6 in |
109.4 |
5.6 |
232.8 |
| 160S300-18 |
6 in |
113.2 |
5.6 |
237.0-238.1 |
| 160S400-20 |
6 in |
125.9 |
5.6 |
275.4 |
| 160S400-22 |
6 in |
133.5 |
5.6 |
283.9 |
| 160S400-24 |
6 in |
141.0 |
5.6 |
292.5 |
| 160S500-28 |
6 in |
167.8 |
6.2 |
393.5 |
| 160S500-29 |
6 in |
186.2 |
6.9 |
488.2 |
| 160S600-31 |
6 in |
200.2 |
6.9 |
500.0 |
| 160S600-33 |
8 in |
200.2 |
7.6 |
648.5 |
| 160S600-36 |
8 in |
211.5 |
7.6 |
666.1 |
| 160S750-39 |
8 in |
226.0 |
7.6 |
716.9 |
Source: Grundfos SP data booklet, 60 Hz, May 2026. Max. diameter includes the cable guard and motor. Net weight for part 93143931 is from Grundfos Product Center; the booklet prints 42.3 lb. Not in the booklet tables, dimensions on request: 160S300-18 (230V 3Ph, 6 in motor).
Before You Buy — The Limits That Decide the Fit
| Check |
What to confirm |
| Well size |
6 in casing or larger; 8 in or larger for the 160S500-29, 160S600-31, -33, -36 and 160S750-39 |
| Submergence |
At least 5 ft of water above the pump |
| Single phase |
A Grundfos control box is required and sold separately: 98315256 (2 HP), 98315260 (5 HP) |
| Three phase |
A magnetic starter or drive is needed and is not included |
| Power |
Match horsepower, voltage and phase to your service. Single-phase and three-phase builds are not interchangeable |
| Water temperature |
MS4000 4 in: up to 104°F (40°C); MS6000C 6 in: up to 104°F (40°C); MMS6 6 in (160S600-31): up to 104°F (40°C) with 1.6 ft/s flow past the motor; MMS6 6 in (160S500-28 and -29): up to 122°F (50°C) with 1.6 ft/s flow past the motor; MMS8000 8 in: up to 113°F (45°C) with 1.6 ft/s flow past the motor |
| Duty point |
Choose the model from the Grundfos curve at your flow and total head. Send us the pumping level, pipe run and pressure and we will check it against the curve |
Materials of Construction
| Part |
Material |
| Pump |
Stainless steel, EN 1.4301 (AISI 304) |
| Impellers |
Stainless steel, EN 1.4301 (AISI 304) |
| Motor, 4 in MS4000 |
Stainless steel, EN 1.4301 (AISI 304) |
| Motor, 6 in MS6000C |
Stainless steel, DIN W.-Nr. 1.4301 (AISI 304) |
| Motor, 6 in MMS6 |
Cast iron, DIN W.-Nr. 0.6025 (ASTM Class 35-40) (160S500-28 and -29); Stainless steel, DIN W.-Nr. 1.4401 (AISI 316) (160S600-31) |
| Motor, 8 in MMS8000 |
Cast iron, DIN W.-Nr. 0.6025 (ASTM Class 35-40) |
Source: Grundfos Product Center.
