The Grundfos CM 1 Horizontal Multistage Pump (CM 1) is part of the Grundfos CM range, engineered in Cast iron, 304 SS or 316 SS (material codes A / I / G). Delivers up to 12 GPM at heads up to 140 ft, with motor sizes from 0.5-1.5 HP. Drive: Fixed-speed NEMA TEFC motor. Used in Pressure boosting and similar applications.
Specifications
| Max flow | 12 GPM (60 Hz) |
| Max head | 140 ft |
| Max working pressure | 145 psi |
| Motor range | 0.5-1.5 HP |
| Stages | up to 5 |
| Frequency | 60 Hz |
| Voltage | 115/230 V single-phase or 208-230/440-480 V three-phase (model dependent) |
| Liquid temperature | 5 - 250 °F (-20 - 250 °F with HQQV seal) |
| Construction | Cast iron, 304 SS or 316 SS (material codes A / I / G) |
| Motor | Fixed-speed NEMA TEFC motor |
| Brand | Grundfos |
| Model | CM 1 |
| Country of Origin | Denmark / USA (varies by model) |
Materials of Construction
Cast iron volute (A); all 304 SS (I); all 316 SS (G). Silicon-carbide/silicon-carbide AQQE (EPDM) or AQQV (FKM) shaft seal
Typical Applications
- Pressure boosting
- water supply
- light commercial booster sets
- washdown
- RO pre-feed
- irrigation
- industrial process
Datasheets & Manuals
Industries & Applications
The Grundfos CM 1 is widely deployed across these industries and use cases:
- Domestic and light-commercial pressure boosting
- Small irrigation systems
- Industrial washdown
- Light process water transfer
- Ro membrane pre-feed
- Rainwater harvesting systems
Related & Compare
Frequently Asked Questions
- What is the maximum flow rate of the Grundfos CM 1?
- The CM 1 delivers up to 12 GPM at 60 Hz.
- What is the maximum head/pressure of the CM 1?
- Maximum head is 140 ft (about 145 psi). Actual operating point depends on stage count and motor size.
- What materials of construction are available for the CM 1?
- Cast iron volute (A); all 304 SS (I); all 316 SS (G). Silicon-carbide/silicon-carbide AQQE (EPDM) or AQQV (FKM) shaft seal
- What applications is the Grundfos CM 1 suitable for?
- Pressure boosting, water supply, light commercial booster sets, washdown, RO pre-feed, irrigation, industrial process
- Can this pump be supplied with a variable frequency drive (VFD)?
- Yes - either order the matching E-Pump variant with integrated MLE motor (CRE / CRIE / CRNE / CME), or pair the fixed-speed pump with a Grundfos CUE external VFD.
- What shaft seal options are available?
- Standard HQQE (carbon/SiC with EPDM) for cold/warm water and HQQV (carbon/SiC with FKM) for hot water and aggressive media. Cartridge double seals available for hazardous duty.
- Is the Grundfos CM 1 available with stock or quick-ship lead times?
- Many configurations ship from stock through Grundfos USA. Contact ForeverPure Place for current lead time on your specific configuration.
- How do I get a quote for the Grundfos CM 1?
- Use the Request Quote button on this page, call our sales team, or email sales@foreverpureplace.com with model, voltage, materials, seal type and quantity.
Need help selecting the right CM 1 configuration, NEMA motor, materials or seal type? Contact our pump engineering team for sizing assistance, pricing and lead times.
Accessories for This Pump
Commonly specified alongside fixed-speed Grundfos pumps. Send us your pump nameplate and we will confirm the correct part for your exact build and voltage before you order.
CUE Variable Frequency Drive
External VFD that converts this fixed-speed pump to constant-pressure or variable-flow control.- RPS Pressure Sensor
Discharge pressure feedback for constant-pressure booster control.
