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

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

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

GALLERY

In the field

Here are some examples of our solutions being used.

Talk to us today

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.

What do drainage submersible pumps do on site?

Drainage submersible pumps remove or transfer unwanted water from a wide range of environments — from construction and mining sites to tunnels, basements, and flood zones. Designed to operate fully submerged, they eliminate the need for priming and reduce the risk of cavitation. Their ability to handle water with suspended solids ensures reliable performance in demanding conditions.

Can these pumps run dry?

Yes — selected Grindex models feature advanced run-dry capability, with built-in thermal protection and a modular design that simplifies maintenance. This not only protects the pump during unexpected dry runs but also contributes to their reputation as one of the most reliable and durable drainage submersibles on the market - ideal for long-term, low-maintenance performance in demanding environments.

What size and performance range do you cover?

Across the ranges shown, inlets span roughly 2–10 inches with max flows listed up to about 350 L/s and heads up to 200 m on certain models. Check the overview tables or download the Dewatering, Bypass & Sewage Pumps Guide to match size, head, flow and solids to your job.

Do you supply and support submersibles NZ-wide?

Yes. Prime Fluid Management operates across New Zealand with six branches, a warehouse and servicing workshop. We provide equipment, service and support nationwide.

What’s the difference between drainage and sewage submersibles?

Drainage units focus on dewatering clean to lightly contaminated water and managing site water levels. Sewage units are engineered to move raw or solids-laden wastewater, with cutter, vortex or single-channel impellers to reduce clogging and pass larger solids. View our range of sludge & slurry submersibles here

Agri Pumps

Stormwater

Industrial

Discharge Compliance

Dewatering Dredge Pumps

Heavy-duty dewatering

Reducing environmental disturbance

Built for extreme challenges

Overview of our Dewatering dredge Pumps

View our full range of dredge pumps and dredges

In the field

Read Dewatering, Bypass & Sewage articles

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

Agri Pumps

Stormwater

Industrial

Discharge Compliance

Dewatering Dredge Pumps

Heavy-duty dewatering

Reducing environmental disturbance

Built for extreme challenges

Overview of our Dewatering dredge Pumps

View our full range of dredge pumps and dredges

In the field

Read Dewatering, Bypass & Sewage articles

See other Dewatering, Bypass & Sewage Pumps

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