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PHONE HOTLINE:
0800 482 747
E-MAIL:
info@primefluid.co.nz
Contact
PHONE HOTLINE:
0800 482 747
E-MAIL:
info@primefluid.co.nz
Contact

Solutions 
Dewatering, Bypass & Sewage
Effluent Management
Industrial
Sludge & Slurry
Stormwater/Flooding
Wastewater Treatment
Water Treatment

Popular
Dewatering, Bypass & Sewage
Piston Pumps NEW
Water Quality Monitoring

 

 

Pump Types
Auto Prime
Air-operated
Concrete Washdown
Dredge Pumps - Dewatering
Dredge Pumps - Sludge & Slurry
Dredges
Flexi, Trash & Diaphragm
High Head Pumps
Handy-sized Pumps
Lamella Settling Tanks
Peristaltic 
pH Correction
Piston Pumps
PTO (auto prime)

Agri Pumps

Centrifugal
Primary Sludge
Progressive Cavity
Shore-mounted
Stirrers
Submersibles


Proportional Dosing
Settling Tanks & Bag
Submersibles - Drainage
Submersibles - Slurry & Sludge
Stirrers - WWTP
Trash, Flexi & Diaphragm
Water Quality Monitoring
Wellpointing

Stormwater

Flood Response
Pump Stations

Industrial

Chemicals
Food Processing
Fuels & Oils
Hot Oil
Hot Water
Hygienic
Marine
Solids Handling Pumps
Vacuum & Blowing
Viscous Fluids Pumps
Wastewater

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Discharge Compliance

Comprehensive water treatment and monitoring solutions

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0800 482 747

Submersible Drainage Pumps

Submersible drainage pumps manage water levels and prevent flooding to ensure safe, efficient operations.

Continuous operation, minimal maintenance

Submersible drainage pumps remove or transfer excess water from work sites - either off-site or to where it’s needed, helping maintain dry, safe, and operational conditions in civil construction, mining, and quarrying across New Zealand.

By shifting water quickly, they reduce costly downtime and keep crews on the job. Because they run submerged, drainage pumps do not need priming and are less prone to cavitation. They are suited to water with fine abrasives and light suspended solids.

We supply a range of drainage submersible pumps to suit your conditions, from rainwater in trenches and excavations to pump stations and corrosive mine environments. Our team helps you specify the setup best suited to your drainage needs, including duty point, materials, and accessories, with service and support across New Zealand.

Grindex Submersible Pumps

Ultimate durability

Grindex pumps deliver optimal efficiency, reliability, and durability. Their advanced engineering includes run-dry technology, built-in thermal protection and modular construction for fast and efficient maintenance.
Ultimate durability
Proril Submersible Pumps

Dependable

Featuring chrome steel impellers, a special polyurethane cable and other smart technical solutions, Proril drainage submersibles guarantee optimal reliability when pumping excess water.
Dependable

Overview of our Drainage Submersibles

Grindex Drainage Submersibles

Rugged, lightweight, run-dry electric submersibles.

  • Size: 50mm - 254mm (2” – 10”)
  • Max flow: 350L/s
  • Max head: 200m
  • Max Solids: 12mm
Find Datasheets
Proril Drainage Submersibles Durable submersible series designed for optimal reliability.
  • Size: 50mm – 203mm (2” - 8”)
  • Max flow: 110 l/sec
  • Max head: 90m
Find Datasheets
Proril Cutter Sewage Submersibles Featuring a chopper plate and tungsten carbide alloy tips the Proril GoCut Cutter series handles raw sewage, shredding fibrous materials to prevent clogging.
  • Size: 50mm –102mm (2” – 4”)
  • Max flow: 22L/sec
  • Max head: 20m
  • Max solids: 37mm
Download Datasheets
Vortex Sewage Submersibles Proril GOVOX series vortex sewage submersibles transfer large solids and fibrous matter without obstruction.
They offer low impeller wear and long pump life.
  • Size: 50mm –102mm (2” – 4”)
  • Max flow: 28L/sec
  • Max head: 34m
  • Max solids: 55mm
Download Datasheets
Grindex Stainless Handling pH 2 -11 Grindex INOX stainless steel submersibles perform in the harshest of dewatering environments.
Constructed from AISI 316 stainless steel minimum.

  • Size: 50mm – 203mm (2” – 6”)
  • Max flow: 130L/sec
  • Max head: 200m
  • Max solids: 80mm
Find Datasheets
Proril Stainless Handling pH 4-10, the Proril stainless range of corrosion-resistant, durable pumps transfer clean or slightly contaminated water in demanding environments.
  • Size: 50mm – 76mm (2” - 3”)
  • Max flow: 11L/sec
  • Max head: 20m
  • Max solids: 40mm
Download Brochure
Hydraulic Drainage Submersibles Powered by a hydraulic powerpack the BBA BA150KS_D285 SUB hydraulic submersible pump suits sewage and trash applications that require powerful submersible pumping.
  • Drive: diesel DriveOn®
  • Max flow: 435m³/hr
  • Max pressure: 40mwc
  • Max solids: 100mm
Proril Single Channel Sewage Submersibles Proril GOMAX series submersible pumps use a single-channel enclosed impeller with air-release valve for highly efficient, non-clogging sewage transfer.

  • Size: 76mm – 152mm (3” – 6”)
  • Max flow: 100L/sec
  • Max head: 42m
  • Max solids: 76mm
Download Datasheets
Accessories Prime Fluid Management holds stock of a wide range of quality fittings and dewatering accessories.
  • Bauer Fittings & adapters
  • Strainers 
  • Fuel tanks & generators
Bosman Vision Series Fish-Friendly Pumps

The Bosman Vision Series are compact, low noise, low footprint submersible draining and irrigation pumps that perform at range, with limited impact on aquatic life and waterways. 

  • Flow: 12 - 360m3/min
  • Efficiency: up to 85%
  • Fish mortality <2% 
  • Water-lubricated bearings  
View Range
GALLERY

In the field

Here are some examples of our solutions being used.

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Read Dewatering, Bypass & Sewage articles

Download the Civil, Quarrying & Mining Product Guide 2026

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Auto-prime Pumps

Simplify your bypass or dewatering set-up with ...

Dewatering dredge Pumps

Heavy duty pumps for when dewatering gets dirty.

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

Make an enquiry

Let’s sort your fluid management needs 
Speak to an expert

Ben Beatson

Ben Beatson
 Sales Engineer

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Charlie Petrie

Charlie Petrie
 Sales Manager

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William Filleul

William Filleul
 Sales Engineer

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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.