Grundfos 99155406, CM5-G Series, Model CM 5-3
Product Overview
System downtime during the height of the growing season is more than an inconvenience; it is a threat to your reputation and your client's bottom line. When a primary booster pump fails in a commercial irrigation setup or a nursery operation, the resulting loss of pressure can lead to immediate turf stress, crop dehydration, and expensive emergency service calls. With global supply chains frequently causing long lead times for specialized motor components, waiting until a pump burns out is a high-risk strategy. Securing the Grundfos CM 5-3 now ensures you have the reliable pressure required to meet project deadlines and keep your clients' systems operational when summer heat is at its peak.
The Grundfos CM5-G series offers a significant technical advantage over standard residential-grade pumps by utilizing a compact, modular design that fits into tight spaces without sacrificing hydraulic performance. This horizontal multistage centrifugal pump is engineered for continuous duty, meaning fewer callbacks for overheating and a longer service life compared to lower-grade alternatives. By installing a pump with a dedicated mechanical shaft seal and high-grade stainless steel internals, you reduce long-term maintenance labor and provide your clients with a lower total cost of ownership. Maintaining your inventory with these units gives you a competitive edge, allowing your crews to perform rapid replacements while other contractors are stuck waiting on back-ordered parts.
Product Specifications
| Specification | Detail |
|---|---|
| Material | Cast Iron Base with Stainless Steel Internals |
| Model Number | CM 5-3 (99155406) |
| Pump Type | Horizontal Multistage Centrifugal |
| Nominal Flow Rate | 22.9 GPM (5 m3/h) |
| Number of Impellers | 3 |
| Inlet/Outlet Connections | 1.25 inch NPT Inlet / 1 inch NPT Outlet |
| Liquid Temperature Range | -4 F to 194 F |
| Maximum Operating Pressure | 145 PSI (10 bar) |
| Voltage Configuration | Three-Phase or Single-Phase (Verify per model) |
| Color/Finish | Grundfos Black and Silver |
Available Models & Sizes
The Grundfos CM series is available in several configurations ranging from the CM1 to the CM25, offering various flow rates and pressure stages to meet specific head requirements. Please contact our technical sales team for full configuration details, electrical specifications, or bulk pricing for larger commercial projects.
Key Features
- Compact modular design facilitates easy integration into existing skid packages or tight mechanical rooms.
- High-grade stainless steel impellers provide superior resistance to corrosion and abrasive wear over time.
- Electro-coated cast iron parts ensure a long service life even in humid or damp installation environments.
- The specialized mechanical shaft seal reduces the risk of leaks and protects the motor from moisture damage.
- Lower noise emissions during operation make this unit ideal for residential booster applications and LEED projects.
- Direct-coupled motor and pump assembly eliminate the need for alignment, significantly reducing installation labor.
Common Applications
- Commercial landscape irrigation
- Agricultural and crop irrigation
- 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 CM 5-3 requires standard pipe wrenches and sealing compounds compatible with stainless steel fittings. Ensure the pump is mounted on a level, solid foundation to minimize vibration and stress on the piping. Installers must follow all local electrical codes; a dedicated circuit with proper motor protection is highly recommended to prevent premature winding failure. Always prime the pump body before initial startup to avoid dry-running the mechanical seal, which can lead to immediate damage and voided warranties.
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