Grundfos CMB 5-46 1.2 HP pressure booster pump with a 60-litre pressure tank, designed to deliver reliable and consistent water pressure for 2–5 bathrooms. Ideal for homes, villas, shower panels and solar water heater applications.
Key Specifications
| Specification | Details |
|---|---|
| Brand | Grundfos |
| Product Type | Pressure Booster Pump |
| Model | CMB 5-46 / CM 5-5 |
| Motor Power | 1.2 HP / 0.9 kW |
| Power Supply | Single Phase, 220–240 V |
| Frequency | 50 Hz |
| Pressure Tank | 60 Litres |
| Maximum Flow | Up to 100 L/min |
| Maximum Head | Around 49 m at low/no flow |
| Inlet Size | 25 mm |
| Outlet Size | 32 mm |
| Suitable Bathrooms | 2–5 bathrooms |
| Shower Capacity | Up to 4 showers according to the supplied listing |
| Tank Type | Pressure/expansion tank |
| Net Weight | 32 kg |
| Gross Weight | 34 kg |
| Warranty | 1 year, on-site manufacturer warranty |
| Motor Protection | Built-in thermal protection |
| Start/Stop | Up to 80 starts/stops per hour |
The supplied product page lists the 1.2 HP rating, 60 L tank, 25 × 32 mm inlet/outlet, single-phase configuration and suitability for 2–5 bathrooms.
Performance
The hydraulic data shown on the product page gives approximately:
| Flow | Head |
|---|---|
| 0 m³/h | 49 m |
| 1 m³/h | 47 m |
| 2 m³/h | 46 m |
| 3 m³/h | 45 m |
| 4 m³/h | 42 m |
| 5 m³/h | 37 m |
| 6 m³/h | 30 m |
So, for practical domestic applications, this is a high-pressure multistage booster pump intended to maintain better water pressure when several bathroom fixtures are being used.
Main Features
- 1.2 HP powerful motor
- 60-litre pressure tank
- Suitable for 2–5 bathrooms
- Can support multiple shower outlets
- Quiet operation
- Compact design
- Built-in thermal protection
- Wide operating range
- Pressure switch for automatic operation
- Pressure gauge included
- Non-return valve included
- Reliable multistage centrifugal pump design
- Suitable for domestic water-pressure boosting
Grundfos’ technical documentation identifies the CMB range as a domestic/light-duty pressure booster system and specifies features such as quiet operation, compact construction and stainless-steel wetted components.
What’s Included
According to the product listing, the package contains:
- Grundfos booster pump
- 60 L pressure tank
- Pressure switch
- Pressure gauge
- Non-return valve
- User manual
- Warranty certificate
Recommended Applications
This pump is particularly suitable for:
- 🏠 Independent houses
- 🏢 Villas
- 🚿 Multiple bathrooms
- 🚿 Shower pressure boosting
- 💧 Solar water heater pressure boosting
- 💧 Overhead/above-ground tank water supply
- 🛁 Shower panels
- 🏨 Small residential/commercial applications
Important: The CMB 5-46 is a non-self-priming booster pump, so the installation should have an appropriate water source/feed arrangement. Grundfos documentation also lists maximum system pressure around 10 bar for the CMB range.
