Hydro Multi-S Series Booster System


Grundfos Hydro Multi-S booster sets consist of two or three identical Grundfos CM, CMV or CR pumps, connected in parallel and mounted on a common base frame, and a control cabinet with motor protection and integrated controller.
Hydro Multi-S booster sets are supplied as complete, pre-assembled and tested systems including suction and discharge manifolds, isolating valves, non-return valves, pressure gauge and pressure switches. To ensure reliable operation, the booster set must be fitted with a suitable diaphragm tank. The pumps are automatically operated according to system demand by means of pressure switches (one for each pump).


  • Offices
  • Schools
  • Hotels
  • Irrigation systems.

General specifications

  • Direct On Line panel (DOL)
  • ON-OFF pump controls
  • Automatic pump switch
  • Easy-to-use control panel
  • Contact output for alarm signal
  • Easy by-pass operation in case of electronic controller malfunction
  • Automatic operation after resolution of dry operation malfunction
  • Manual resetting of overload malfunction
  • Emergency operation
  • Chassis: Galvanized collector: AISI 304 stainless steel

Technical Specifications

  • Maximum flow rate: 2-81 (m3/h)
  • Maximum pump head: 10-100 (m)
  • Pressure class: 10/16 bar
  • Maximum motor power: 7.5 kW
  • Liquid temperature: +5…. +50 (˚C)
  • Ambient temperature: 0…. +40 (˚C)
  • Number of pumps: 2 or 3 pumps / Hydro Pack pump


  • Reliable
  • Highly efficient
  • Service-friendly
  • Compact
  • Easy to commission
  • Suitable for emergency operation.


As a manufacturer of high-end appliances A.O. Smith claims to maximize user convenience and comfort. Therefore, we must be able to support and guarantee that our products run impeccably. Customer satisfaction throughout the service life of our products, that´s A.O. Smith´s promise.
By offering a comprehensive range of services (such as sizing, commissioning, service and maintenance) A.O. Smith validates that promise.