The Grundfos 25S50-21 (product number 92968740) is a stainless steel submersible groundwater pump supplied complete with motor, rated 25 US gpm nominal flow, 21 stages, a 5 HP submersible motor.
Pump & Hydraulic Data
| Model | 25S50-21 |
| Nominal flow | 25 US gpm |
| Stages | 21 |
| Minimum well diameter | 4" minimum |
| Discharge connection | 1½" NPT |
| Pump orientation | Vertical, submersible |
Values decoded from the Grundfos type designation. Full head/flow curve and NPSH data for this configuration are available on request.
Motor & Electrical
| Rated power | 5 HP |
| Phase | Three-phase |
| Voltage | 440–460 V |
| Frequency | 60 Hz |
| Motor type | Grundfos submersible, supplied with pump |
Materials & Construction
| Pump material | AISI 304 stainless steel |
| Construction | Sand-resistant, corrosion-resistant stainless steel |
| Built-in check valve | Yes — standard on SP |
Weights & Identification
| Net weight | 63.1 lb |
| Gross (shipping) weight | 66.9 lb |
| Shipping dimensions (L × W × H) | 63 × 4.7 × 4.3 in |
| Grundfos product number | 92968740 |
| EAN | 5715122319705 |
| Material pricing group | WH |
Typical Applications
Groundwater supply from drilled wells • municipal and rural water supply • irrigation and agriculture • pressure boosting • reverse osmosis and membrane filtration feed • industrial process water • mine dewatering.
Need the performance curve, NPSH data, or help matching this pump to your well depth and duty point? Contact ForeverPure Place — we will pull the factory data for this exact configuration and confirm lead time.
