Dewatering dredge Pumps

Heavy-duty dewatering

The Prime Fluid Management team is experienced in heavy-duty dewatering, delivering cost, time and resource savings for our customers. Our Dragflow range of dredge pumps and mini dredges are a key part of solution. Dragflow are innovators in compact, portable dredge solutions, making them a natural fit for challenging and often remote, New Zealand environments. Employ dredge pumps for rapid management of solid and silt-laden water, or for ongoing heavy-duty dewatering at maximum efficiency with minimum wear and limited impact on the surrounding environment.

SAFETY

Reducing environmental disturbance

Dragflow dredge pumps and mini dredges are engineered to minimize environmental impact, helping to prevent spills and contamination during dredging operations.

Precision dredging
Low turbidity
Energy conservation
Minimal disturbance
Customisable

SITE ENVIRONMENT

Built for extreme challenges

Dragflow dredge pumps and mini dredges deal efficiently to large volumes of sediment-laden water. They are well-suited to reclamation and coastal protection work, and pond and channel cleaning.

Key features include:

High efficiency agitator: reversible and high chrome for long life and continuous flow lifting of deposited sediments.
Low rotation speed: reduced wear and long-term efficiency.
Rugged and heavy-duty construction: highly resistant components for loaded and abrasive mixes.

Overview of our Dewatering dredge Pumps

Hydraulic Dredge Pumps

Suited to high head and heavy dewatering, dam or pond cleaning, extraction and coastal protection.
Significant economy over traditional methods.

Size: 100mm – 355mm (4”-14”)
Max flow: 29,167 L/min
Max head: 56m
Solids: 120mm

FInd DataSheets

Heavy-duty Electric Dredge Pumps

Move large volumes of abrasive materials without clogging or excessive wear. Available with advanced control panels for remote monitoring.

Size: 75mm – 300mm (3”-12”)
Max flow: 20,000 L/min
Max head: 27m
Solids: 120mm

View DataSheet

Mini Dredges Maximise versatility and effectiveness with Dragflow's small but mighty mini dredges.
Remote-controlled, easy to transport, easy to assemble .

Pontoon (min): 1.5m x 1.5m x 0.4m
Weight (incl. pump): 250kg – 920kg
Draft: 0.11m – 0.30m

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GALLERY

In the field

Here are some examples of our solutions being used.

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They brought their mechanics, they didn't just dump it and leave….couldn't have done it without them to be honest

Mark CadwalladerCatchment Worker

This sort of unique system you set up is what sets you apart from others in the Market

Jacob Warmsley Project Manager

I had an amazing experience with Prime Pump at the Transmission Gully ... will recommend you guys anytime and anywhere.

Peter FisherDirector

You guys had our backs from the get-go and stood beside us and persevered.

DaveOps Director

We called for a different type of solution…... We were pretty happy with what's been delivered

Rob KerrProject Director

Prime supplied us with the best solution for hire and the instant availability was what we needed… We certainly will be using them in the future

Priscilla EllmersWastewater Supervisor

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Ben Beatson
Sales Engineer

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Brent Petrie
Sales Engineer

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Charlie Petrie
Sales Manager

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Questions

FAQ

At Prime Fluid Management, we understand that every fluid management challenge brings unique considerations. Here, you’ll find clear, practical answers and expert guidance to help you maximise uptime, achieve regulatory compliance, extend equipment life, and implement the most effective solution for your site.

Is an auto-prime pump the same as a “dry prime” or dry-prime dewatering pump?

On a lot of drawings and pump schedules, dry-prime pump or dry-prime dewatering pump is used as shorthand for a surface pump that can handle air and doesn’t need manual priming. In practice, the auto-prime units that Prime Fluid supplies are vacuum-assisted pumps with a dedicated priming system, so they meet the intent of most “dry prime” specs while giving you a modern, quieter and more efficient package.

When would I use auto-prime dewatering pumps instead of a self-priming dewatering pump or submersible?

Auto-prime units are usually the better option when the pump has to sit above the water, suction conditions might change, or you expect a lot of air to enter the line during setup and operation. A self-priming dewatering pump or submersible can still be the right choice on simpler, more static jobs, and Prime can talk you through which option will be more reliable and cost-effective for your site.

Do you supply diesel dewatering pumps and can they be automated?

Yes – Prime can supply auto-prime packages as diesel dewatering pump sets or electric sets, depending on what power you have available and how the system will run. With the right control panel and level sensors, those same units can be configured as an automated pump or “auto water pump” that starts and stops itself, which is helpful on remote or 24/7 sites where you don’t want someone constantly watching the pump.

Can Auto-prime Pumps be used for flood control and emergency response?

Auto-prime units are a good fit for temporary flood control pumps because they can be moved quickly, cope with long suction and discharge lines, and re-prime themselves as water levels change. Prime Fluid can set up high-flow Auto-prime Pump solutions for New Zealand councils and contractors that form part of a wider flood or stormwater contingency plan.

What information do you need to size the right Auto-Prime Pump in New Zealand?

To match an Auto-Prime Pump New Zealand job, one of our sales engineers will usually ask for your required flow, total dynamic head, suction depth, discharge route, expected solids size and how long the pump needs to run. If your documents mention terms like autoprime dewatering pumps, auto vacuum pump or use a generic “dry prime” note, sending those details through with a simple sketch of the setup helps the team recommend the most suitable package for your project.

Dewatering Dredge Pumps

Heavy-duty dewatering

Reducing environmental disturbance

Built for extreme challenges

Overview of our Dewatering dredge Pumps

In the field

Read Dewatering, Bypass & Sewage articles

Download the Civil, Quarrying & Mining Product Guide 2026

See other Dewatering, Bypass & Sewage Pumps

They brought their mechanics, they didn't just dump it and leave….couldn't have done it without them to be honest

This sort of unique system you set up is what sets you apart from others in the Market

I had an amazing experience with Prime Pump at the Transmission Gully ... will recommend you guys anytime and anywhere.

You guys had our backs from the get-go and stood beside us and persevered.

We called for a different type of solution…... We were pretty happy with what's been delivered

Prime supplied us with the best solution for hire and the instant availability was what we needed… We certainly will be using them in the future

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Equipment • Expertise • Results

Dewatering Dredge Pumps

Heavy-duty dewatering

Reducing environmental disturbance

Built for extreme challenges

Overview of our Dewatering dredge Pumps

In the field

Read Dewatering, Bypass & Sewage articles

Download the Civil, Quarrying & Mining Product Guide 2026

See other Dewatering, Bypass & Sewage Pumps

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