Grundfos Submersible Booster SBA 3-35A

SBA 3-35 A


SBA is a complete all-in-on submersible multistage booster solution designed for domestic applications. SBA comes with an integrated control unit eliminating the need for an external pump controller.

Suitable for.

  • Controls & Digital Groundwater Management
  • Attic
  • Basement
  • Bathroom
  • Garden
  • Kitchen
  • Living space
  • Domestic water pressure boosting
  • Domestic rainwater harvesting
  • Solar Controls & Digital Water Management
  • Solar Water Treatment Fertigation & Dosing
  • Community water supply


Grundfos SBA 3-35 A is an all-in-one submersible booster designed for pumping clean water for domestic use. The SBA is built on the proven SB platform and comes with an integrated control unit. This eliminates the need for an external pump controller in the house. It is silent when submerged and therefore a noiseless alternative to surface-mounted pumps. The pump is built from high-quality composite and stainless steel materials that are resistant to corrosion.

The SBA 3-35 A is equipped with a 15 m supply cable, and the maximum installation depth is 10 m below the water level, with a liquid temperature ranging from 0 °C to 40 °C.

The pump starts automatically when the pipe pressure falls below 2.2 bar.

The SBA 3-35 A is ideal for operation in a well or ground tanks, as it easily prevents solid particles from entering the pump. The maximum particle size is 1 mm.

The single-phase model is effectively protected against any accidental overload by built-in thermal protection.

The pump has built-in thermal protection, which immediately stops the pump if it overheats. Having cooled down, the pump automatically restarts when it reaches a normal temperature.


Rated flow 3 m³/h
Rated head 28.5 m
Maximum head 34 m
Impellers 3
Max. Particle 1 mm
Approvals CE
Curve tolerance ISO9906:2012 3B
Return valve YES
Adjustable start pressure N
Start pressure 2.2 bar
Rated speed 2800 rpm



Pump housing Composite, PP - GF30
Impeller Composite, PPO-20GF



Range of ambient temperature -10 .. 50 °C
Type of inlet connection STRAINER
Pump outlet
G 1"
Pressure rating for connection
PN 6
Maximum installation depth 10 m



Pumped liquid Water
Liquid temperature range 0 .. 40 °C
Selected liquid temperature 20 °C
Density 998.2 kg/m³
pH-value range 4-9



Power input P1
0.72 kW
Rated power - P2
0.47 kW
Mains frequency
50 Hz
Rated voltage
1 x 220-240 V
Rated current
3.3 A
Starting current
12 A
Cos phi
Rated speed
2800 rpm
Capacitor size - run
12 µF/450 V
Enclosure class (IEC 34-5) IP68
Insulation class (IEC 85)
Built-in motor protection YES
Length of cable 15 m
Cable type
H07RN-F 3G1
Type of cable plug AUS



Grundfos Submersible Booster SBA 3-35A Brochure Grundfos Submersible Booster SBA 3-35A Brochure