

Grundfos 98125919, CM5-I Series, Model CM 5-8
Product Overview
A failing booster pump during the peak of the irrigation season is more than a mechanical issue; it translates to immediate system shutdowns, scorched turf, and frustrated clients. With summer temperatures rising and project deadlines tightening, the pressure to maintain consistent water delivery is critical. Current supply chain fluctuations mean that waiting for a total pump failure before ordering can lead to weeks of downtime and lost revenue. By securing the Grundfos CM5-8 now, you eliminate the risk of back-orders during high-demand periods, ensuring your clients' landscapes remain vibrant and your reputation for reliability stays intact.
The Grundfos CM5-8 offers a significant technical advantage over standard centrifugal pumps through its modular multi-stage design and superior material composition. Constructed with high grade stainless steel, this unit provides exceptional corrosion resistance and a longer service life compared to cast iron alternatives. Its compact footprint allows for easier integration into existing mechanical rooms or enclosures, significantly reducing labor hours during retrofit installations. By stocking these high efficiency units, you provide your crews with a reliable solution that minimizes call-backs and maximizes long term performance for demanding residential and commercial applications.
Product Specifications
| Specification | Detail |
|---|---|
| Material | AISI 304 Stainless Steel (I-Version) |
| Stages | 8 Stages |
| Motor Type | Single-Phase or Three-Phase available |
| Maximum Flow Rate | Approximately 30 GPM at peak efficiency |
| Pressure Rating | Up to 145 PSI operating pressure |
| Connection Size | 1.25 inch Inlet, 1 inch Outlet |
| Certifications | UL, CSA, and NSF/ANSI 61 for potable water |
| Color/Finish | Natural Stainless Steel with Black Motor Housing |
Available Models & Sizes
The Grundfos CM series is available in several configurations, including various stage counts from the CM1 to the CM25 to meet specific head and flow requirements. This specific model, the CM 5-8, represents a mid-range flow capacity with high pressure capabilities, and is available in AISI 304 or AISI 316 stainless steel builds. Contact our technical sales team for full configuration options, voltage specifics, and current bulk pricing for large scale projects.
Key Features
- Multi-stage horizontal design provides quiet operation and high pressure output for demanding irrigation zones.
- AISI 304 stainless steel construction ensures durability in diverse water conditions and resistance to aggressive chemicals.
- Mechanical shaft seal engineered for high temperature resistance and reduced friction to extend the life of the motor.
- Compact, modular design allows for flexible installation in tight spaces where traditional pumps cannot fit.
- High efficiency motor technology lowers energy consumption for your clients, providing a lower total cost of ownership.
- Directly compatible with Grundfos variable frequency drives for precise pressure control and system optimization.
Common Applications
- Commercial landscape irrigation
- Residential lawn and garden systems
- Sports turf and golf course maintenance
- Municipal parks and public spaces
- Greenhouse and nursery operations
- Potable water supply systems
Installation Notes
Installation of the Grundfos CM5-8 requires proper alignment with the suction and discharge piping to prevent stress on the pump housing. It is recommended to use flexible connectors on the inlet and outlet to dampen vibration and protect the integrity of the plumbing. Ensure the motor is wired according to the specific voltage requirements listed on the nameplate, and check local building codes for required electrical disconnects and grounding. Always prime the pump body fully before initial startup to prevent damage to the mechanical seal and internal components.
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