Umbra Pompe Acuabig 5 Inch Borehole Pump | High-Flow, 2 Inch Outlet

5" Borehole Pump with 2" Outlet for Maximum Flow

Highest Flow Option in the Well and Borehole Pump Range

The Acuabig is a 5 inch borehole pump designed to move large volumes of water quickly, making it the highest flow option in the range. Manufactured by Umbra Pompe.

With a 2" outlet and flow rates up to a maximum of 195 litres per minute, it is suited to irrigation, agricultural and transfer applications where volume is the priority. If you need a balance of pressure and flow instead, see the Acuatec; for high pressure from a deeper borehole, see the Acuasub.

Acuabig usage

The Acuabig is suited to:

• 5" boreholes
• Irrigation systems
• Agricultural water supply
• Water transfer and storage systems
• Industrial and processing applications

It is the right choice where you need to move more water, more quickly, rather than generate maximum pressure.

Why choose the Acuabig

• Largest outlet in the range (2") for high flow systems
• Highest flow rates across the borehole pump range
• Designed for volume-driven applications
• Available as manual or automatic (float switch)
• 230V single phase supply

How it operates

The Acuabig is available in two versions:

• Manual version runs continuously when powered
• Automatic version fitted with a pendant float switch for level-based operation

The float switch requires space to operate:

• Not suitable for narrow boreholes
• More suited to tanks, wells or larger chambers

On manual models, flow can be controlled by including a pressure controller in the delivery line.

Acuabig build and design

The Acuabig is a multi-stage pump designed to maximise flow efficiency.

• Stainless steel body and strainer
• Multi-stage impellers
• Oil-cooled motor
• Non toxic oil
• Integral starting capacitor

Performance overview

Performance depends on the model selected.

• Flow up to approx. 195 litres per minute
• Moderate to high head depending on model
• Maximum submersion depth: 17 metres
• Operating temperature: 0°C to 35°C

Flow rate is consistent across the range, with all models delivering up to approximately 195 litres per minute. The key difference between models is the head (pressure capability):

• Acuabig 2-200 up to 27 metres head
• Acuabig 3-200 up to 43 metres head
• Acuabig 4-200 up to 57 metres head

Head is effectively a measure of pressure. As a guide, 10 metres of head is roughly equal to 1 bar. Higher head models are used where water needs to be pushed further or lifted to greater heights.

Installation

Installed within a 5" borehole, tank or chamber depending on setup. Requires a larger borehole than the 4" pumps. The Acuabig has a 2" outlet (Female BSP).

It can be connected using a 2" (50mm) male BSP hose tail (see hose tails and connectors), making it well suited to:

• High pressure delivery hose
• Irrigation systems
• Water transfer setups

The pump is suitable for clean water and can handle water containing up to 60 g/m³ of suspended solids.

Drinking Water and WRAS Approval

Umbra Pompe states that these pumps are suitable for potable water. This relates to the materials used in their construction. The pumps are not, however, WRAS approved.

WRAS approval generally applies to products connected to the public mains water supply and is not normally required for a private borehole, which operates as a separate water source. For drinking-water systems, the suitability of the complete installation should also be considered, including the pipework, fittings, storage and any required water-quality testing.

Important notes

• Designed for clean water, including rainwater and stored water
• Can handle small suspended solids (up to 60 g/m³)
• Not suitable for sewage or heavy abrasive material
• Float switch version requires space to operate

Drawing from a borehole or watercourse? Check whether you need an abstraction licence first.

What's in the box

• ✅ Acuabig pump
• ✅ 20m rubber power cable
• ✅ Float switch (automatic versions only)