Skip to content
Close
SEARCH
CONTACT
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

640x500_FI_water-treatment_lamella-clarifier-solar2
Discharge Compliance

Comprehensive water treatment and monitoring solutions

Read more
0800 482 747

Handy, Trash & Diaphragm Pumps

Hard-working drainage pumps for as-required site dewatering or water circulation.

Deal to nuisance water

Our range of portable trash, diaphragm and handy-sized submersible pumps work well when dewatering is intermittent or water, sludge or waste volumes are low. They will deal to groundwater, sludge or abrasive liquids with solids in a range of civil, quarrying or mining or municipal applications.
Ease of use

Move fluid fast

With self-prime or no-prime options and electric or petrol drives, our handy-sized pump range is designed for quick set-up and operation.
Move fluid fast
Reliability

Built tough to last

These pumps work hard. They endure frequent use in contaminated, debris-heavy water, so we choose brands with a reputation for durability.
Built tough to last

Overview of our Handy, Trash, Diaphragm Pumps

Caffini Electric Diaphragm Pumps

Designed for high flow, low pressure situations where transfer of thick slurries is required.

  • Size: 50mm - 152mm
  • Max Flow: 830L/min
  • Max Head: 15m
  • Max Solids: 60mm
View brochure
Caffini Petrol Diaphragm Pumps

Designed for high flow, low pressure situations where transfer of thick slurries is required.

  • Size: 50mm - 102mm
  • Max flow: 520L/min
  • Max head: 15m
  • Max Solids: 60mm
View brochure
Trash Pumps Caffini manufacture a fast, self-priming centrifugal trash pump with tool-free maintenance. Transfer contaminated liquids with solids up to 40mm.
  • Size: 76mm - 102mm
  • Max flow: 144m³/hr
  • Max head: 32m
  • Max solids: 40mm
View brochure
Flexi-drive Pumps

A lightweight, portable dewatering pump with rugged frame, protected coil, cast-iron impeller and 3-dog coupling for safer handling. No priming required.

  • Size: 76mm (3")
  • Max flow: 1100 l/min
  • Max head: 26 m
Grindex Handy Submersibles Run-dry indefinitely, SMART motor technology, supreme efficiency. Grindex submersibles are tougher and lighter than most.
  • Size: 50mm – 152mm (2”– 6”)
  • Max flow: 350L/s
  • Max head: 200m
  • Max solids: 11mm
Proril Handy Submersibles

Compact, lightweight Proril SMART and SAVVY series pumps provide reliable low-volume dewatering for domestic and small construction applications.

  • Size: 25mm – 50mm (1”- 2")
  • Max flow: 110L/s
  • Max head: 90m
  • Max solids: 35mm

View our full dewatering, bypass and sewage pump range.

Download
GALLERY

In the field

Here are some examples of our solutions being used.

Talk to us today

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

Submersible drainage pumps manage water levels and prevent ...

High Head Pumps

Efficient high head surface mount and submersible pumpsets ...

Handy, Trash, Diaphragm Pumps

Hard-working drainage pumps for as-required site dewatering ...

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

Email
Phone
Gerhard Rudolph

Gerhard Rudolph
 Hire Account Management

Email
Phone
Brent Petrie

Brent Petrie
Sales Engineer

Email
Phone
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.