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Skip Navigation LinksDepartment of Housing and Public Works > Construction > Building and plumbing > Plumbing and drainage > On-site sewage facilities > Approved systems

Approved systems

On-site sewage treatment plants

The following on-site sewerage treatment facilities are approved for use to treat sewage of 20 equivalent persons or less:

Approvals granted under Section 186(3) of the repealed Standard Sewerage Law remain in force under Section 108 of Standard Sewerage Law 1998 until the approval expires under the repealed law.

Greywater treatment plants and greywater diversion devices

Greywater treatment plants must be approved by the department.

Greywater diversion devices are not approved by the department, but must have WaterMark Certification and comply with the requirements of the Plumbing and Drainage Act 2002 (PDA). Consumers and plumbers must satisfy themselves that WaterMark approval has been granted.​​

Last updated 30 July 2019    Creative Commons Attribution 4.0 International (CC BY 4.0)

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