Grundfos Submersible Booster 3-35AW

SB 3-35 AW


Grundfos SB 3-35 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.

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


The Grundfos SB is a compact, submersible booster pump designed for the delivery of clean rainwater for domestic use.

  • Start/stop float switch control -The included oat switch will stop the pump if the water source runs dry and re-start when sufficient water is added.
  • Virtually silent submerged operation - Won’t disturb your family or neighbours.
  • Easy submerged installation – plug & pump - Connect the pump outlet to the pipework, plug into a power outlet and you’re ready to pump.
  • For water sources above or below ground - Designed to be submerged in either above-ground water tanks or below-ground water sources.
  • Floating suction strainer option - Available with standard suction strainer or optional floating suction strainer, which takes in water from the surface where it is likely to be cleaner.


Rated flow 3 m³/h
Rated head 25.2 m
Maximum head 34 m
Impellers 3
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
0.7 kW
Rated power - P2
0.47 kW
Mains frequency
50 Hz
Rated voltage
1 x 220-240 V
Rated current
3.35 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 3-35AW Brochure Grundfos Submersible Booster 3-35AW Brochure