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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
Proril Drainage Submersibles Durable submersible series designed for optimal reliability.
  • Size: 50mm – 203mm (2” - 8”)
  • Max flow: 110 l/sec
  • Max head: 90m
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
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
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
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
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
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

View our full dewatering, bypass and sewage pump range.

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In the field

Here are some examples of our solutions being used.

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Read Dewatering, Bypass & Sewage articles

See other Dewatering, Bypass & Sewage Pumps

wellpointing piston pumps and dewatering solutions

High-efficiency pumps & wells engineered for NZ conditions.

Drainage Submersibles

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Handy, Trash, Diaphragm Pumps

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Auto-prime Pumps

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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. 

How does a wellpointing system work on site?

A wellpointing system uses a series of small-diameter wellpoints installed in a line or ring around an excavation. Each wellpoint is a screened inlet, connected via a riser pipe to a header main that runs back to the wellpointing pump.

At Prime Fluid Management, we pair this layout with positive displacement piston pumps that deliver consistent high pressure, automatically prime, and move a mixture of water and air without restriction. This setup lowers the groundwater level around the excavation, creating a more stable and workable site in New Zealand’s variable soil conditions.
What do wellpoints, riser pipes (risers) and swing joints do in a wellpointing system?

In a typical wellpointing setup:

  • Wellpoints or filters are the screened inlet sections installed in the ground that draw groundwater into the system.
  • Riser pipes or risers are the vertical pipes that connect each filter up to the surface and into the header main. 
  • Swing joints are the flexible connections between each riser and the header main, usually incorporating a valve so flow from each wellpoint can be adjusted or isolated as needed.

At Prime Fluid Management, our wells and accessories range includes steel wells, PVC and self-jetting wellpoints, header pipes and swing joints. Your wellpointing system can be set up and fine-tuned to suit site conditions — or our experienced operations crew can help you configure an optimal system when hiring our equipment.
Why use slotted screen wellpoints?

Because different ground conditions call for either slotted screen or wedge-wire wellpoints, slotted screen designs are often used where sand control and steady groundwater intake are needed. At Prime Fluid Management, we supply PVC slotted screen wellpoints, also commonly referred to as spears, which are simple to install, economical and reusable.

For more substantial groundwater flows or tougher ground conditions, we also supply 150mm (6 inch) steel wells — custom-designed by our team. These ensure fast installation and improved water quality. 

The slotted screens create a controlled intake area that allows groundwater to enter freely while keeping sand and fines out of the system. This helps protect pumps and maintain system performance over longer operating periods.

To view the full range of wellpointing pumps and accessories, download our Civil, Quarrying and Mining Product Guide 2026
What is a jetting lance and how does it work with your jetting pumps and jetting units?

A jetting lance is the handheld pipe used to install wellpoints. It connects to a high-pressure jetting pump and directs water into the ground to fluidise the soil, allowing each wellpoint and riser to be jetted down to its design depth.

At Prime Fluid Management, we have jetting pumps and jetting units that are purpose-built for this task — providing compact, high-pressure pumping for installing wellpoints and other jetting applications. Options include skid-mounted units with twin 1,200 L tanks, along with remote-controlled outlets for jetting and dust suppression.
When is a wellpointing solution the right choice compared with other dewatering methods?

Wellpointing is often the right choice for shallow to moderate depth excavations where you need controlled drawdown of the groundwater table along a trench or around a structure.

It’s widely used on New Zealand civil sites for pipelines, shallow foundations, services and pits — particularly in sandy or fine-grained soils where open pumping is not enough to keep the excavation stable.

At Prime Fluid Management, we design wellpointing solutions around your project requirements, matching piston pumps, wells, risers, swing joints and jetting equipment to local soil conditions, perched water and site constraints. If wellpointing isn’t the best fit, we can also assess alternative options in the dewatering, bypass and stormwater range, including auto-prime pumps and drainage submersible solutions.
Why use a piston pump for wellpoint dewatering?

Piston pumps provide reliable suction in unpredictable ground conditions. They use positive displacement to move water and air through a sealed chamber, making them ideal for wellpointing applications where a consistent vacuum must be maintained — even with low or fluctuating inflow. This makes piston pumps highly dependable in unstable soils. 

At Prime Fluid Management, we supply the BBA PT-Series piston pump range, which offers unmatched economy of use. These pumps are highly fuel efficient and maintenance-friendly, requiring servicing only every 1,500 hours — up to six times longer than standard piston pumps. You can read 

The PT-Series is available in battery-electric, diesel and hybrid configurations, providing flexible drive options to suit different site requirements. Find out more in our article about BBA Piston Pump efficiency.