Grundfos CM5-4 Booster Pump for S8 Systems
£983.00 Inc VAT
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Grundfos CM5‑4 Booster Pump for S8 Systems
Robust, High-Pressure Multistage Pump for Pool & Spa Water Treatment
Overview
The Grundfos CM5‑4 is a compact, horizontal, end-suction multistage centrifugal booster pump crafted from stainless steel and cast iron. Engineered for use in water treatment systems—such as private pools, hotels, spas, and ozone injection setups—it’s renowned for its reliability, quiet operation, and adaptability. The “S8 Systems” variant is optimized to enhance water circulation and chloramine removal.
Key Features
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Multistage Design: Equipped with four stainless steel impellers and chambers built to handle high-pressure applications efficiently.
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High Performance: Delivers up to ~4.7 m³/h at approximately 30.7 m head (approx. 78 L/min @ 30 m head).
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Robust Construction: Stainless steel hydraulic components combined with a cast iron inlet/outlet ensure durability in demanding environments.
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Quiet, Compact & Modular: Engineered for low noise and adaptability in tight spaces, ideal for replacement or integration in existing S8 setups.
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Ozone Compatibility: Specifically designed for use with ozone injection systems, featuring ozone-safe seals and materials.
Technical Specifications
| Feature | Specification |
|---|---|
| Model | CM5‑4 (OXUY variants for ozone) |
| Flow Rate | ~4.7 m³/h (~78 L/min) |
| Head (Max) | ~30.7 m |
| Power | ~0.85 kW / 1.15 HP |
| Impellers | 4-stage stainless steel |
| Pump Housing | Cast iron (inlet/outlet), stainless steel chambers |
| Motor | 3-phase, fan-cooled IE2; 2.3 HP (≈1.15 kW); 50 Hz, 220–415 V |
| Connections | Suction: ISO Whitworth Rp 1 ¼″; Discharge: Rp 1″ |
| Operating Range | -20 °C to 90 °C; max pressure 10 bar |
| Speed | ~2900 rpm |
| Dimensions (approx.) | ~417 × 142 × 208 mm (L × W × H) |
| Weight | ~14.9 kg net / ~15 kg |
| Noise Level | Quiet operation (fan-cooled motor) |
Benefits
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Enhanced Water Quality: Ideal for boosting circulation to improve filtration, dosing, and ozone treatment effectiveness.
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Space-Saving Installation: Compact foot-mounted design works in tight mechanical rooms and retrofit setups.
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Long Service Life: High-quality materials and wear-resistant seals (AVBE/AQQE) deliver reliable operation with minimal maintenance.
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Ozone-Ready: Ozone-safe seals and stainless steel components make it suitable for S8 ozone booster systems.
Applications
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Pool & Spa Booster Systems: Enhances filtration, dosing, and disinfection performance.
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Ozone Injection Setups: Compatible with S8 ozone units, ensures efficient gas dissolution.
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Water Treatment Circulation: Ideal for systems requiring high-pressure flows and compact footprint.
Summary
The Grundfos CM5‑4 Booster Pump is a dependable, high-performance pump that meets the needs of pool, spa, and ozone-based systems. Built for quiet operation, durability, and easy installation, it’s perfect for S8 systems and similar water treatment installations. Whether you’re replacing an existing unit or upgrading capacity, the CM5‑4 delivers precise flow control and longevity in a compact design.
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