Approved greywater systems

Greywater is the wastewater from:

  • showers
  • baths
  • handbasins
  • washing machines
  • dishwashers
  • sinks in kitchens and laundry sinks.

It does not include toilet waste.

The Code of Practice for the Reuse of Greywater in Western Australia 2010 (PDF 1.3MB) provides information on the requirements for the reuse of greywater in household gardens.

The Code provides guidelines for:

  • householders
  • persons wishing to design and market systems.

There are 2 types of greywater reuse systems used in WA:

  • greywater diversion device
  • greywater treatment system.

Greywater diversion device

The greywater diversion device (GDD):

  • diverts greywater without storage or treatment
  • incorporates a hand activated switch or tap to divert the greywater to the garden or the sewer.

Greywater from a GDD must only be reused in gardens via sub-surface irrigation only.

GDDs must have a WaterMark Licence, which demonstrates compliance with the Australian Technical Specification ATS5200.

There are 2 types of GDDs:

Gravity GDD

A gravity GDD incorporates a hand activated valve, switch or tap. It is fitted to the outlet of the waste pipe of the plumbing fixture, such as a laundry tub.

GDD are not permitted to be fed with greywater from the kitchen. Greywater from a gravity GDD is diverted directly to a subsurface irrigation system in the garden.

Pump GDD

A pump GDD incorporates a surge tank to cope with sudden influxes of greywater.

It is used for the distribution of greywater directly to a subsurface irrigation system in the garden.

The surge tank does not operate as a storage tank.

Table 1: List of approved greywater diversion devices.

Manufacturer

Model

Approval Date/
Watermark Licence Number

Details of use

Advance Waste Water Systems (external site)

Phone: 9309 2304

GFLOW GFGFP

WMKT 21323

18/11/2018

  • Up to 5 bedrooms or 10 persons
  • No kitchen greywater allowed
  • Pumped
GREY FLOW GF00
GREY FLOW GF001
GREY FLOW GFPS
GREY FLOW GFUS
GREY FLOW Pro range
(Models 90-1; 90-2; 120; 180 and 240)

Aquarius Wastewater Management (external site)

Phone: 9244 5322

Aquarius Domestic Greywater Unit (DGU) MKII/

WMKT 22210

7/8/2017

  • Up to 5 bedrooms or 10 persons
  • No kitchen greywater allowed
 Aquarius Gecko Single Fixture
Greywater Diversion Unit
 21/1/2014

Filtrex Innovative Wastewater Solutions (external site)

Phone: 9726 0118

Filtrex Greywater Drip System

1/2/2008

  • Up to 4 bedrooms
  • No kitchen greywater allowed

Greywater Reuse Systems (external site)

Phone: 9295 6263

GRS Filter (GRS-V and GRS-H)

WM 70075

20/9/2009

  • Up to 5 bedrooms or 10 persons
  • No kitchen greywater allowed

Just Water Solutions Pty Ltd (external site)

Phone: (03) 5258 5193

Grey Water Gator Pro

WMKT 22111

21/2/2019

  • Up to 5 bedrooms or 10 persons
  • No kitchen greywater allowed
Grey Water Gator Maxi 100

Matala Water Technology (external site)

WA Supplier:

Earth & Water Pty Ltd (external site)

Phone: 9313 1299

Aqua2use GWDD

WMKT 30004

20/3/2017

  • Up to 4 bedrooms
  • No kitchen greywater allowed

Wattworks Pty Ltd (external site)

pHONE: (03) 988 3117

Wattworks Smartpit

WMKT 60026

16/4/2017

  • Up to 10 persons
  • No kitchen greywater allowed

Greywater treatment system

A greywater treatment system (GTS) collects and treats greywater to a higher quality.

Treated greywater that is not disinfected may only be reused via subsurface irrigation.

Disinfected greywater from a GTS that achieves water quality targets may be used for:

  • surface irrigation
  • toilet flushing
  • cold water supply to washing machine.

It should be noted that conditions of approval may vary, depending on the design. Some GTSs:

  • are not permitted in unsewered areas
  • do not accept kitchen waste.
  • are not available on a smaller scale.

Developers interested in large wastewater reuse schemes or in-house reuse for commercial or subdivision developments should refer to the Australian Guidelines for Water Recycling: Managing Health and Environmental Risks (Phase 1) 2006 (external site).

Table 2: List of approved greywater treatment systems.
Manufacturer Model      Approval Date / Watermark Licence Number        Details of use

Wise Water Solutions PL (external site)

Phone: 9756 1790

Greywise 7/1/2017 Approved reuse methods:
  • toilet flushing
  • cold water supply to clothes washing machines
  • no kitchen greywater allowed
  • above ground spray irrigation
  • surface drip irrigation covered by mulch
  • sub-surface drip irrigation installed at around 100 mm depth

Approved greywater disposal systems

The following systems are designed to dispose of greywater on site. These systems are only permitted in unsewered areas.

Table 3: Approved greywater disposal systems
Manufacturer Model Approval Date / Watermark Licence Number Details of use 

Greywater Reuse Systems (external site)

Phone: 9294 6263

GRS Standard Trench Bed Systems (for greywater) 30/05/2003 Systems to be assembled and installed in accordance with Australian Standards 1547:2000 and/or GRS – AS Trench Bed installation specifications.

Rotaloo (external site)

WA Supplier:
Michael Ward

Phone: 9295 6838

Niimi Absorption Trench

3/5/1996
  • To be used with a 1800L sedimentation tank
  • Up to 4 bedrooms or 8 persons

Expired systems awaiting watermark certification

The approvals for the following systems have expired. These systems may be approved once the product obtains WaterMark certification.

Table 4: Expired systems awaiting certification.
Manufacturer Model
Approval date/
Watermark Licence Number
Details of use

Nylex Water Solutions (external site)

Phone: 100 139 569

 Nylex Greywater Diverta 9/3/2005 (PST20057)
  • Up to 5 bedrooms or 10 persons
  • No kitchen greywater allowed

Plastic Plumbing Products Pty Ltd (external site)

Phone: (03) 9335 6666

Eco-Care Greywater Diverter System 28/9/2005 (PST20083)
  • Up to 5 bedrooms or 10 persons
  • No kitchen greywater allowed

Assessed and not approved OR Approval withdrawn

WaterGurus Pty Ltd

More information

Water Unit, Environmental Health Directorate
Department of Health
Phone: 9388 4999
Email: ehinfo@health.wa.gov.au

Last reviewed: 20-06-2016
Last updated: 01-09-2016
Produced by

Public Health