Grundfos Jet 4-47PM Pump

JP 4-47 PM1


JP PM is a booster that consists of a pressure manager and a self-priming, single-stage centrifugal pump. JP PM is designed for various garden and domestic applications and has dry-running protection.

Suitable for:

  • Attic
  • Bathroom
  • Domestic groundwater intake
  • Domestic water pressure boosting
  • Domestic rainwater harvesting


Grundfos JP 4-47 PM1 booster consists of a Grundfos JP pump and a pressure manager. The JP 4-47 PM1 provides the comfort of constant water pressure with automatic start and stop matched to consumption by the intelligent pressure manager. The pressure manager starts the pump at 1.5 bar and the pump keeps running as long as there is flow.

The design is robust and built upon corrosion-free materials to ensure a long lifetime. This booster set ensures optimum self-priming properties, featuring a suction-lift up to 8 meters. The self-priming pump also ensures a stable operation as is it able to lift liquid from below the inlet level and can handle a mix of air and liquid until the pump reaches a fully-primed pumping condition.

The JP 4-47 PM1 incorporates dry running protection that automatically stops the pump in case of dry running. This means lower risk of pump damage and lower maintenance costs. The anti-cycling function will stop the pump in time in case of a minor leakage in the system, or if a tap has not been closed completely. When cycling occurs, the pump stops, and an alarm will be indicated. A non-return valve for backflow prevention is already integrated.

The JP pump has built-in thermal protection, which immediately stops the pump if it overheats. The motor is air cooled and equipped with oversized, sealed, greased-for-life ball bearings to ensure silent operation and minimum service.



Pumped liquid Water
Liquid temperature range 0 .. 40 °C
Selected liquid temperature 20 °C
Density 998.2 kg/m³



Rated flow
4 m³/h
Rated head: 41 m
Primary shaft seal BBVP
Approvals CE,WM,C-TICK
Curve tolerance ISO9906:2012 3B
Adjustable start pressure: N
Start pressure: 1.5 bar
Rated speed 2800 rpm



Pump housing Stainless steel, EN 1.4301, AISI 304
Impeller Composite
Material code A



Minimum ambient temperature 0 °C
Max. ambient 40 °C
Maximum operating pressure PN 6 bar
Pump inlet G1
Pump outlet G1


Electrical data

Power input - P1 850 W
Rated power - P2 0.56 kW
Mains frequency 50 Hz
Rated voltage 1 x 230 V
Rated current 3.8 A
Starting current 11.3 A
Rated speed 2800 rpm
Capacitor size - run 12 µF/450 V
Enclosure class (IEC 34-5) IP44
Insulation class (IEC 85) F
Type of cable plug AUS



Grundfos Jet 4-47PM Pump Brochure Grundfos Jet 4-47PM Pump Brochure