CMBE is a high-efficiency compact booster suitable for clean water supply and pressure boosting in domestic and light commercial applications. It keeps constant pressure via the integrated speed control

Description The Grundfos CMBE booster pump is a compact, high-efficiency pressure boosting system for clean water supply in homes, apartments, villas, and light commercial applications. If your property suffers from unstable water pressure when more than one tap is opened, or if pressure drops between floors, the CMBE is designed to keep pressure stable through its integrated speed control. Unlike a traditional fixed-speed pump that runs at one speed, the CMBE uses a built-in frequency converter and a pressure sensor to adjust motor speed according to water demand. When demand increases, the pump raises performance. When demand drops, it reduces speed. This helps provide constant pressure, quieter operation, and better energy use. Benefits of the Grundfos CMBE Booster Pump The Grundfos CMBE is built for users who want reliable water pressure without complicated pump controls. It combines the pump, motor, pressure control, pressure tank, and protection functions in one compact booster set. These are the key benefits: Keeps constant water pressure using integrated speed control. Suitable for clean water supply and pressure boosting in domestic and light commercial applications. Helps reduce pressure fluctuations caused by changing water demand. Built-in frequency converter adjusts pump speed instead of running at full speed all the time. Dry-running protection helps protect the pump if the water supply is interrupted. Built-in thermal protection protects the motor from slow overloading and blocking. Low-noise operation compared with many conventional pressure boosting solutions. Stainless-steel pump housing and stainless-steel impellers for corrosion resistance and long service life. Compact, fully equipped booster design that is easier to install than building a system from separate parts. Who Needs a Grundfos CMBE Booster Pump and When to Use It The CMBE is useful when the water source exists but the delivered pressure is not stable or strong enough. It is especially suitable when the customer needs automatic pressure control instead of a basic on/off pump. These are the situations where it is commonly used: Homes and villas with weak water pressure at taps, showers, or upper floors. Apartments that need stable pressure during high and low water demand. Light commercial buildings where clean water pressure must remain consistent. Water supply systems connected to roof tanks, ground tanks, or booster lines. Installations where dry-running protection and automatic control are important. Projects that need a compact booster set instead of a separate pump, controller, pressure tank, and sensor assembly. Components of the Grundfos CMBE Booster System The CMBE is supplied as an integrated booster set. According to Grundfos Product Center data, the system is based on a CME pump with a built-in frequency converter and the necessary control components to maintain pressure. The system includes: CME multistage pump with integrated frequency converter. Pressure sensor that monitors changes in water consumption. Integrated pressure control for constant pressure operation. Small integrated pressure tank. Non-return valve / return valve. Pressure gauge / manometer assembly. Stainless-steel pump housing. Stainless-steel impellers. EPDM rubber components in the listed Grundfos variants. IP55 motor enclosure and Class F insulation in official Grundfos data. How the Grundfos CMBE Booster Pump Works The CMBE monitors water pressure through its pressure sensor. When water use changes, the sensor sends a signal to the integrated speed controller. The controller then adjusts motor speed so the pump can match the required demand and maintain the selected pressure level. This is what makes the CMBE different from a simple booster pump. Instead of switching only on and off, it varies its speed to keep pressure more stable. This is useful in homes where water demand changes throughout the day, such as morning shower use, kitchen use, washing machines, and multiple taps running at the same time. Available CMBE Options We offer two CMBE booster options. The model names below match the Grundfos CMBE family naming and the horsepower options shown for the product: Option Likely Grundfos CMBE model Power Option performance 1.5 HP option CMBE 3-62 1.5 HP / 1.1 kW class Up to 3 m³/hour at 62 m head 2 HP option CMBE 5-62 2 HP class Up to 5 m³/hour at 62 m head Technical Specifications of the Grundfos CMBE Booster Pump The following specifications combine the product details shown here with official Grundfos Product Center data for the CMBE 3-62 and CMBE 5-62 family. Exact performance can vary by selected variant, country version, electrical frequency, and installation conditions. Specification CMBE 3-62 / 1.5 HP option CMBE 5-62 / 2 HP option Application Clean water supply and pressure boosting Clean water supply and pressure boosting Pressure control Integrated frequency converter / speed control Integrated frequency converter / speed control Listed flow/head for this option Up to 3 m³/hour at 62 m head Up to 5 m³/hour at 62 m head Official Grundfos rated flow 4.2 m³/hour in a 50 Hz Product Center listing; 18.5 US gpm in a US Product Center printout 26.4 US gpm in the official 60 Hz Product Center listing Official Grundfos rated head 45.2 m in a 50 Hz Product Center listing; 148.3 ft in a US Product Center printout 156.8 ft in the official 60 Hz Product Center listing Rated voltage 1 x 200-240 V 1 x 200-240 V Rated speed range 360-4000 rpm 360-4000 rpm Maximum operating pressure 10 bar / 145 psi class 10 bar / 145 psi class Liquid Clean water Clean water Liquid temperature range 0-60°C / 32-140°F depending on regional listing 32-140°F in the official 60 Hz listing Pump housing Stainless steel, EN 1.4301 / AISI 304 Stainless steel, EN 1.4301 / AISI 304 Impellers Stainless steel, 4 impellers Stainless steel, 4 impellers Tank volume 2 liters / 0.528 gal class 0.528 gal class Enclosure class IP55 IP55 Insulation class F F Current product page dimensions 35 cm length x 22 cm width x 45 cm height 35 cm length x 22 cm width x 45 cm height Frequently Asked Questions About the Grundfos CMBE Booster Pump These questions can help you decide whether the CMBE booster pump is suitable for your property. For final sizing, the required pump should be selected according to the building height, pipe network, water source, number of outlets, and expected water demand. What is the Grundfos CMBE used for? It is used for clean water supply and pressure boosting in domestic and light commercial applications. It helps keep water pressure stable when demand changes. What is the difference between the 1.5 HP and 2 HP options? The 1.5 HP option corresponds to the CMBE 3-62 class and provides up to 3 m³/hour at 62 m head for this option. The 2 HP option corresponds to the CMBE 5-62 class and provides up to 5 m³/hour at 62 m head. The 2 HP option is generally selected when higher flow demand is required. Does the CMBE keep pressure constant? Yes. Grundfos describes the CMBE as a compact booster that keeps constant pressure via integrated speed control. The pressure sensor detects changes in demand and the frequency converter adjusts motor speed accordingly. Does the pump have dry-running protection? Yes. The CMBE booster includes dry-running protection to help protect the pump when water supply is interrupted. Is the pump suitable for drinking water or clean water? The CMBE is intended for clean water supply. Some official Grundfos variants include drinking-water approvals such as NSF61 or WRAS depending on the country/version, so the exact certification should be confirmed for the supplied unit. Does it need an external control panel? The CMBE includes a built-in frequency converter and integrated pressure control. Final electrical protection and installation requirements should still follow the installer’s design and local electrical standards. Important Notes Before Installation Correct pump sizing is essential. The 1.5 HP and 2 HP options should be selected according to required flow, target pressure, number of floors, pipe losses, and available inlet water supply. Installation should be performed by a qualified technician to ensure correct electrical connection, pipe connection, pressure setting, and dry-running protection setup.