GRUNDFOS - CMBE MULTI-STAGE BOOSTER SYSTEMS CMBE 1-75 - Phase 1 1 110x120 - 98810921

The Grundfos CMBE 1-75 (MPN 98810921) is a premium variable-speed constant-pressure booster system designed to deliver reliable water pressure for residential and light commercial buildings. Powered by a 1 HP permanent magnet ECM motor operating on 110–120V, the system combines a stainless steel multistage pump, integrated variable frequency drive, pressure sensor, expansion tank, pressure gauge, and check valve into one compact package. The intelligent controller continuously adjusts motor speed to match changing water demand, providing consistent pressure while reducing energy consumption and operating noise. Ideal for municipal water boosting, irrigation, rainwater harvesting, storage tanks, and water transfer applications, the CMBE 1-75 offers dependable, energy-efficient performance.

Cross References

1. Grundfos — 98810921
2. Grundfos — CMBE 1-75
3. Grundfos — 98548120 (200–240V version of the CMBE 1-75 series)

Usage

The CMBE 1-75 is designed to maintain constant water pressure in residential homes, apartments, irrigation systems, commercial buildings, and rainwater harvesting systems. The integrated pressure sensor monitors system demand and automatically adjusts motor speed through the built-in variable frequency drive, ensuring steady pressure regardless of how many fixtures are in use. The included expansion tank minimizes pump cycling, while dry-run protection, thermal protection, and an integrated check valve improve reliability and extend pump life.