The Grundfos SP 3A-18 (product number 10013618) is a SP3A stainless steel submersible well pump rated 17.6 US gpm at 377.3 ft across 18 stages, supplied complete with a three phase Grundfos MS402 submersible motor.
Performance Curve
Official Grundfos curve — 60 Hz, water at 68 °F. Head (H) and efficiency (η) against flow (Q); lower chart shows power and NPSH required.
Performance & Hydraulic Data
| Rated flow | 17.6 US gpm |
| Rated head | 377.3 ft |
| Stages | 18 |
| Pump speed (data basis) | 3450 rpm |
| Pump type | SP3A |
| US designation | SP3A-18 |
| Maximum operating pressure | 217.56 psi |
| Maximum outlet pressure | 240.76 psi |
| Built-in return valve | Yes |
| Curve tolerance | ISO9906:2012 3B |
Materials of Construction
| Pump housing | Stainless steel — EN 1.4301 — AISI 304 |
| Impellers | Stainless steel — EN 1.4301 — AISI 304 |
| Motor material | Stainless steel — 1.4301 — 304 |
Installation & Connections
| Discharge connection | 1 1/4 NPT(F) |
| Motor diameter | 4 inch |
| Minimum borehole diameter | 4.13 in |
| Overall length | 34.7 in |
| Liquid temperature range | 5 °F to 104 °F |
Motor & Electrical Data
| Motor power (P2) | 2 HP |
| Voltage & phase | 460 V, three phase |
| Frequency | 60 Hz |
| Rated current | 4.35 A |
| Starting current | 540 A |
| Service factor | 1.25 |
| Insulation class | B |
| Starting method | direct-on-line |
| Enclosure class | IP68 |
| Motor cable | 3.94 ft |
| Grundfos motor number | 79362006 |
Approvals, Weights & Identification
| Approvals | CE,EAC,UKCA,SEPRO,MOROCCO |
| Drinking water | ACS,DM174 |
| Grundfos product number | 10013618 |
| Pump-end number | 10010018 |
| EAN | 5700390304034 |
| Net weight (pump + motor) | 36.4 lb |
| Gross (shipping) weight | 39.7 lb |
Typical Applications
Well and borehole water supply • groundwater abstraction • irrigation • pressure boosting • livestock and rural water • industrial process water.
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