The Grundfos CMB3-46PM1 (also referred to as CMB3-46 PM1; replacement for previous model CM3-5PM1) is an automatic home pressure booster water pump designed to provide reliable water pressure for your household needs. Featuring a modern, space-saving design with built-in pressure control and maintenance-free operation, this multistage pump delivers powerful performance while maintaining a low noise level.

Key Features:

• Automatic start and stop operation based on water demand
• Built-in dry run protection that automatically cuts off the pump when there is no water supply
• Self-priming capability for convenient operation
• Quiet operation with a low noise level of <= 55 dB(A)
• Space-saving and easy-to-install design
• Multistage pump structure with built-in pressure control and maintenance-free design

Product Specifications:

• Brand: Grundfos
• Model: CMB3-46PM1 (CMB3-46 PM1; replacement for previous model CM3-5PM1)
• Product Type: Automatic Home Pressure Booster Water Pump
• Horsepower / Motor Power: 0.67hp (Motor Power P2: 0.75HP / 0.50 kW)
• Electricity Consumption / Power: 500 watt
• Voltage: 220-240V, 50Hz
• Max Flowrate: 3.1 m3/h (3100L per hour)
• Max Head: 46m
• Operating / System Pressure: Approximately 4.6 bar (System Pressure: Max. 10 bar)
• Inlet & Outlet Connection Size: 1 inch inlet & outlet
• Noise Level: <= 55 dB(A)
• Ambient Temperature: 0°C to +55°C
• Liquid Temperature: 0°C to +60°C
• Power Supply Cable: 2m with plug
• Control Unit: PM1 Pressure Manager
• Size (Dimensions): 341L x 317H x 270W (mm)
• Material: Durable & Long-Lasting Materials (Default uses PVC pipes & fittings for installation)

Package Includes:

Package contents are not specified in the available product information. Please contact Bath2u to confirm before purchasing.

Why Choose Grundfos CMB3-46PM1?

This pump is an ideal solution for boosting residential water pressure, offering trusted Grundfos engineering equipped with the PM1 Pressure Manager for seamless automated control, reliable dry run protection, and a quiet, compact build suitable for modern homes.

Ideal Applications:

• Ideal for instant water heater showers

Compatibility:

• Sufficient for 4 bathrooms using rain shower size not more than 10″ (also noted as suitable for 1 to 3 bathrooms)
• Not suitable for houses with low-quality or aging piping systems due to 4.6 bar operating pressure potentially causing pipe leakage issues

Installation Requirements:

• Not weatherproof — must use pump cover or place under shaded area
• House plumbing & power point must be ready before installation

Warranty and Certifications:

• Warranty: 2 years general warranty (Online register: +6 months warranty)
• Certifications: Certified by SIRIM