Grundfos Scala1 3-35 Booster Pump

SCALA1 3-35


SCALA1 is a fully intergrated, compact self-priming, pressure booster for domestic use. It can communicate with Grundfos GO Remote app via built-in Bluetooth technology enabling high customisation options.

Suitable for.

  • Controls & Digital Groundwater Management
  • Attic
  • Basement
  • Bathroom
  • Garden
  • Domestic groundwater intake
  • Kitchen
  • Living space
  • Domestic water pressure boosting
  • Domestic rainwater harvesting
  • Community water supply


The Grundfos SCALA1 is a self-priming, multistage pump, that incorporates all the components of a pressure booster into a compact composite enclosure.

As it is self-priming, the SCALA1 can pump water from a level below the pump. Provided it is filled with water, the pump can lift water from a depth of 8 m in less than 5 minutes. This facilitates easy installation and start-up of the pump and provides more reliable water supply in installations where there is a risk of dry running and leakages in suction hose or pipes.

SCALA1 can communicate with Grundfos GO app via built in Bluetooth, which enables detailed pump monitoring and high customization options, making this pump a good fit for every application.

SCALA1 incorporates advanced protection features such as:

  • Dry running protection that will automatically stop the pump in case of water shortage
  • Cycling protection which will prevent pump starting frequently in case of minor leakages in installation
  • Max runtime protection can stop the pump after a desired period of continuous operation, preventing potential damage due flooding in case of pipe breakages.

The pump has a built-in motor protection that will stop the pump if exposed to excessive temperature due to high ambient temperature, in case of seizure or overload, thus preventing a motor burnout.

With Grundfos GO you can easily setup SCALA1 as a Twin booster system, operating as duty/stand by as well as duty/assist. It is also possible to add external input control and schedule a pump operation via calendar function.

SCALA1 require no maintenance, but it is recommended to keep the pump clean, check the non-return valves and keep the ventilation holes free of dust.


Rated flow 3.72 m³/h
Rated head 20 m
Maximum head 36 m
Shaft seal type BVBP
Approvals CE
Approvals for drinking water WRAS,ACS,Watermark,AS4020
Curve tolerance ISO9906:2012 3B
Model A
Start pressure 1.5 bar



Pump housing Composite
Impeller Composite



Range of ambient temperature 0 .. 55 °C
Maximum operating pressure 8 bar
Maximum permissible inlet pressure
4 bar
Type of inlet connection
Type of outlet connection R
Size of inlet connection 1 inch
Size of outlet connection 1 inch
Pressure rating for connection PN 8



Pumped liquid Water
Liquid temperature range 0 .. 45 °C
Selected liquid temperature 20 °C
Density 998.2 kg/m³



P1 max. 720 W
Rated power - P2 0.45 kW
Mains frequency 50 Hz
Rated voltage 1 x 230 V
Maximum current consumption 3.27 A
Enclosure class (IEC 34-5) X4D
Insulation class (IEC 85) F
Length of power cable 1.5 m
Power plug Type I (AS/NZS 3112) Australian plug



Grundfos Scala1 3-35 Booster Pump Brochure Grundfos Scala1 3-35 Booster Pump Brochure