Grundfos Submersible Booster 3-45AW

SB 3-45 AW


SB is a submersible multistage booster designed for domestic applications. SB requires an external control unit like Grundfos PM1 or PM2 enabling complete pump control with user friendly interface.

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 SB 3-45 AW is a submersible pump designed for the pumping of clean water for domestic and rainwater applications. 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 SB 3-45 AW 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 SB 3-45 AW 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 pump is equipped with a side inlet/flexible hose with floating suction strainer.

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 2.83 m³/h
Rated head 30.1 m
Maximum head 45 m
Impellers 4
Max. Particle 1 mm
Approvals CE
Curve tolerance ISO9906:2012 3B
Return valve NO
Rated speed 2800 rpm



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



Range of ambient temperature -10 .. 50 °C
Type of inlet connection FLOATING 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
1.05 kW
Rated power - P2
0.62 kW
Mains frequency
50 Hz
Rated voltage
1 x 220-240 V
Rated current
48 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 3-45AW Brochure Grundfos Submersible Booster 3-45AW Brochure