Siphon-Actuated Filtration

The StormFilteris a radial cartridge stormwater filter, and has been the industry standard for over 25 years. The first manufactured stormwater filter to gain regulatory approval on a global scale and is the most widely used filter in New Zealand.

StormFilter ™ is a stand out versatile Best Management Practice (BMP) capable of efficiently removing a wide range of pollutants, including sediments, oil and grease, metals, organics, and nutrients, with a range of standard configurations and custom solutions to treat stormwater contaminants and is suited to variety of land uses.

Highly reliable, easy to install and maintain, and proven performance over time, the StormFilter™ is in use by every city council in New Zealand , and Stormwater360 work with a network of maintenance partners to ensure operational success. 

Stormwater360 are the only provider in New Zealand to offer a cartridge exchange programme and Life Time Warranty on the cartridges.

average maintenance
TSS removal
Tested to minimum of 80% TSS removal under NJDEP and Washington Approval.
Designed and refined over two decades
installed throughout New Zealand

How it works



Compact underground design
  • Space-saving design allows for denser developments, reducing urban sprawl. Compact design minimizes excavation, leading to reduced construction and installation costs.
  • Compact design minimizes excavation, leading to reduced construction and installation costs.
Reliable Longevity
  • Self-cleaning hood prevents surface blinding, ensuring the full utilization of filtration media and prolonging cartridge life.
  • Maintenance cycles range from 1 to 3 years.
  • Backed by 8 years of maintenance experience, our contracts (1-5 years) come with cost guarantees.
  • Minimal or no standing water reduces disposal costs.
Superior Hydraulics

Multiple cartridge heights gives design solutions for site restraints offering unparalleled versatility.



Typical applications

The StormFilter can be designed to treat a wide range of applications:

  • Subdivision roading
  • Local roads
  • JOAL/accessway treatment
  • Car parks and Shopping Centres
  • Council Depots
  • Industrial Estates
  • Heavy Vehicle Maintenance
  • Airport Tarmacs
  • Transport Depots & Loading Bays
  • Tunnels
  • Motorways & Roading
  • Recycling Yards

Custom applications

Stormwater360 can provide a customised solution for your project considering your land-use.

Contact us today for further information.

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Maintenance & Operations

Cartridge Exchange
If you wish to maintain your own StormFilter device, we also offer a cartridge exchange service. Refurbished cartridges filled with the appropriate approved filter media are swapped with emptied exhausted cartridges from your site.

StormFilter Cartridge Lifetime Warranty*
Stormwater360 offers a Lifetime Warranty on StormFilter cartridges for those customers under Cartridge Exchange and Full Service maintenance contracts, if the correct Operation and Maintenance procedures are followed and completed.

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Design your own

for site specific needs

Use our free online sizing tool for instant DIY sizing and technical specifications.

Engineered Media

The StormFilter can be customised using different filter media to target site-specific pollutants. A combination of media is often recommended to maximise pollutant removal effectiveness.

Perlite : Effective for removing TSS, oil and grease.

ZPG™ : Approved for highly trafficked sites or sites with high metal loadings.

Zeolite : Remove soluble metals, ammonium and some organics.

GAC (Granular Activated Carbon) : Remove oil and grease and organics such as PAHs and phthalates.

Engineered Media


StormFilter can be seamlessly integrated into various drainage structures including custom design solutions for detention, drywall, catchpit and soakage.



Precast Vault for Medium-Sized Sites

  • Perfect for medium-sized sites.
  • Streamlined installation – arrives fully assembled on-site.


High Flow Solution for Large Sites

  • Handles flows from expansive sites.
  • Comprised of large, precast components designed for easy on-site assembly.
  • Multiple configurations available, including Panel Vault, Box Culvert, and Cast-In-Place.


Precast Manhole for Point-of-Entry Setup

Utilises drop from curb inlet to conveyance pipe to drive passive filtration cartridges.

Effortless installation without the need for a crane (Hi-AB lifting for most sizes).

Available in diameters ranging from 1050 to 2400 mm.

Common Questions

Still have questions?
We are here to help.

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