Name: JP booster pump
Brand: Grundfos
Price: 290.41 EUR
Availability: OutOfStock

Description
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Grundfos JP – self-priming booster pump

The Grundfos JP is a compact single-stage centrifugal booster pump for water supply in the home, garden and small commercial premises. The self-priming design ensures reliable operation when drawing water from wells, tanks and cisterns.

Self-priming. Can lift water from a level of up to 8 m with a properly implemented suction system.

Compact design Easy to carry, install and operate thanks to the convenient lifting handle.

Corrosion resistance Stainless steel housing for long service life.

Description Options and models Construction and materials Comparison

Main advantages of Grundfos JP

Self-priming single-stage centrifugal pump.
Suitable for water supply to single-family and two-family houses.
Suitable for irrigation of gardens and small agricultural areas.
It can be used for water supply from a well, reservoir or cistern.
Suitable for car washes and small commercial applications.
The built-in ejector with guide vanes improves self-priming ability.
The pump housing is made of stainless steel.
The composite impeller provides good corrosion resistance.
Built-in motor protection against overload and overheating.
No additional motor protection is required for standard single-phase versions.
Possibility of combination with automatic pressure control or a pressure vessel.

Applications

Domestic water supply.
Pressure boosting from a buffer or cover tank.
Using water from a well or cistern.
Garden watering.
Small irrigation systems.
Car washes.
Small commercial and agricultural applications.
Pool cleaning with the appropriate stainless steel option.

How does a self-priming pump work?

A self-priming pump can lift water from a level below the pump inlet. It can handle a mixture of air and water until the suction system is purged and the pump reaches normal pumping mode.

The maximum suction height is up to 8 m, and this value must include the losses in the suction pipe. For stable operation, it is important that the suction pipe is correctly sized, bend-resistant and well sealed.

When suctioning from a well or tank, it is recommended to install a non-return foot valve with a suction strainer. For rainwater or well water, it is advisable to use an additional filter at the inlet.

Suitable liquids

Clean fresh water.
Rainwater without solid particles.
Clean, thin and non-aggressive liquids.
Non-toxic and non-explosive liquids.

The pump is not designed for liquids containing solids, fibers, oils, fuels or aggressive chemicals. A higher amount of sand may reduce the service life of the pump.

Installation guidelines

The pump can be installed indoors or outdoors.
For outdoor installation, provide protection against sun, rain, snow and frost.
Place the pump as close to the water source as possible.
Provide a free space of approximately 0.5 m on three sides for cooling and servicing.
Install the pump on a stable horizontal base.
The maximum slope of the base must not exceed 5°.
Avoid air pockets, especially on the suction side.
For long suction pipes, use a larger diameter to limit pressure losses.
Do not use a collapsible hose for the suction pipe.

Choose a JP model

Models differ in maximum flow rate and maximum head. The number before the dash indicates the maximum flow rate, and the number after the dash indicates the maximum head of the pump.

Model	Maximum flow rate	Maximum pressure	Power supply	Product number
JP 3-42	3 m³/h	42 m	1 × 230V, 50Hz	99458766
JP 4-47	4 m³/h	47 m	1 × 230V, 50Hz	99458767
JP 4-54	4 m³/h	54 m	1 × 230V, 50Hz	99458768
JP 5-48	5 m³/h	48 m	1 × 230V, 50Hz	99458769

JP 3-42

Compact self-priming pump with a maximum flow rate of 3 m³/h and a maximum head of 42 m. Suitable for small households, garden irrigation and systems with moderate consumption.

Product number: 99458766

JP 4-47

Pump with a maximum flow rate of 4 m³/h and a maximum head of 47 m. Suitable for single-family and two-family houses, larger gardens and systems with more consumers.

Product number: 99458767

JP 4-54

Pump with a maximum flow rate of 4 m³/h and a maximum head of 54 m. Suitable for higher pressure requirements, longer pipe runs and higher water supply heights.

Product number: 99458768

JP 5-48

Pump with a maximum flow rate of 5 m³/h and a maximum head of 48 m. Suitable for higher consumption, larger houses, garden irrigation and small agricultural applications.

Product number: 99458769

The actual flow rate depends on the required head, the suction height, the length and diameter of the pipes and the losses in the fittings. The maximum values are not reached simultaneously.

Construction and materials

The Grundfos JP is designed for long-term and reliable operation in water supply. The pump combines a stainless steel housing, composite hydraulic components and an air-cooled electric motor.

Component	Material	Purpose
Pump housing	Stainless steel EN 1.4301 / AISI 304	Durable main structure with good corrosion resistance.
Impeller	Composite	Ensures efficient transfer of energy to the water.
Diffuser	Composite	Promotes hydraulic efficiency and self-priming.
Venturi tube	Composite	Part of the built-in ejector for stable self-priming.
Shaft	Stainless steel	Transmits rotation from the engine to the impeller.
Mechanical seal	Carbon, ceramic, NBR	Provides sealing between the hydraulic and motor parts.
Base	Aluminum	Ensures stable attachment of the pump.
Lifting handle	Composite	Makes it easier to carry and position the pump.

Design advantages

Built-in ejector: Provides good self-priming ability up to 8 m.
Stainless steel housing: Offers good protection against corrosion when working with clean water.
Air-cooled motor: Allows for compact design and reliable operation.
Oversized ball bearings: Reduce noise and the need for servicing.
Thermal protection: Turns off the motor when overloaded and turns it back on after cooling.
Compact design: Suitable for installation in limited spaces.

Technical characteristics

Characteristics	Value
Maximum suction height	8 m, including suction pipe losses
Maximum system pressure	6 bar
Maximum liquid temperature	40 °C in continuous operation; up to 60 °C in intermittent operation
Maximum ambient temperature	40 °C in continuous operation; up to 55 °C in intermittent operation
Degree of protection	IP44
Insulation class	F
Power supply	1 × 220–240V, 50/60Hz
Maximum start/stop frequency	20 starts per hour

Comparison of Grundfos JP models

The model is selected according to the required flow rate and head. Higher flow rate is suitable for more consumers and higher water consumption. Higher head is necessary for longer pipe runs, greater height and higher pressure requirements.

Model	Max. flow rate	Max. head	Power P1	Power P2	Weight
JP 3-42	3 m³/h	42 m	720W	447 W	8.6 kg
JP 4-47	4 m³/h	47 m	850W	560W	9.1 kg
JP 4-54	4 m³/h	54 m	1130W	746 W	10.9 kg
JP 5-48	5 m³/h	48 m	1490W	1014 W	12.6 kg

How to choose a model?

JP 3-42: For small households, garden irrigation and systems with up to about 3 m³/h consumption.
JP 4-47: For standard domestic water supply, more consumers and up to about 4 m³/h flow rate.
JP 4-54: For systems with up to approx. 4 m³/h flow and higher head requirements.
JP 5-48: For higher water consumption, larger houses, garden irrigation and small agricultural applications.

When choosing, do not focus only on the maximum pressure. It is necessary to take into account the static height, the suction height, the length and diameter of the pipes, the number of consumers and the required flow rate.

Recommendation for automatic water supply

The standard JP pump is switched on and off by the user. For automatic start and stop according to demand, it can be combined with the Grundfos Pressure Manager. For constant comfort and compensation of small losses, a version with a pressure switch and a pressure vessel can also be used.

In case of an unstable water source and risk of dry running, JP PM Booster is recommended, as the Pressure Manager provides dry running protection and a function against frequent switching on.

The data is in accordance with the provided technical catalogue for Grundfos JP. Check the specific model, electrical supply, required flow rate, head and suction conditions before ordering and installation.

JP booster pump

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Grundfos JP – self-priming booster pump