Blue pipes

Plumbing certification and advice and inspections
Information on existing plumbing work
Backflow Prevention
Compliance Functions
On-site sewerage design
Notifiable Work
Trade Waste

Plumbing Certification and Advice

Isaac Regional Council provides a certification service to approve plumbing work conducted within the Isaac local government area. The certification assessment procedure enables the applicant to gain plumbing approval and ensures that the works complies with the relevant legislation.

Isaac Regional Council's Building and Plumbing Compliance Department provides assessments of plumbing and drainage applications and inspections, for work within the boundaries of an owner's property, pursuant to the current plumbing laws and legislation.  The certification process enables the applicant to gain plumbing approval and ensures that the works comply with the relevant legislation.

Further information regarding the current regulations is available from the Department of Housing and Public Works.

The Isaac Regional Council Plumbing Application Pack (PDF, 831KB) outlines all necessary documentation required to have your plumbing application assessed. The interactive Form 1—Compliance Assessment Application can be found on the Department of Housing and Public Works Website.

QLD Government Approved plumbers and drainers forms

To arrange a plumbing inspection, you must contact the Building and Plumbing Compliance Department on 1300 ISAACS (472227). Please note, a minimum of 48 hours' notice is required as per Plumbing and Drainage Act 2002.

Information on Existing Plumbing Work

Council can supply the following information on request, where current information exists (fees and charges apply):

  • Copies of certificates
  • Plumbing permit searches
  • Copies of "as constructed drainage plans"

Backflow prevention

Our priority is safe drinking water and a major part of this is continual maintenance of backflow prevention devices in our towns and rural areas. Isaac Regional Council's Building and Plumbing Compliance Department therefore maintains a register of all backflow devices within our region to ensure annual tests are undertaken as required.

Council's backflow endorsed Plumbers can perform testing of backflow prevention devices within the Isaac region.

For further information about your obligations regarding maintenance and testing of backflow prevention devices, please view our Backflow Prevention FAQ (PDF, 683KB).

Backflow prevention devices are installed as a requirement under the Plumbing and Drainage Act 2002 and must not be removed. If you believe a device is no longer required, please contact a backflow endorsed Plumber or the Building and Plumbing Compliance team before having the device removed.

If you are a backflow endorsed Plumber and are required to remove a backflow prevention device, please ensure you submit the completed form below to advise Council of this, we can than ensure our register is updated with this information.

Application for Decommissioning of a Backflow Prevention Device (PDF, 96KB)

Compliance Functions

Council performs enforcement functions under provisions of Plumbing and Drainage Act 2002.

On-site Sewerage Design

Isaac Regional Council now offers a design and inspection / testing service for all types of on-site sewerage treatment systems - whether they are just standard septic or aerated treatment systems.

Fill out the On-site Sewerage Design quote application form and our friendly team will contact you.
Find out more about our onsite sewerage design and inspection service (PDF, 408KB).

Notifiable Work

On 1 November 2012, a new category of plumbing and drainage work called 'notifiable work' commenced. Notifiable work extends the amount of work a plumber or drainer can perform without a local government permit or mandatory inspections.

Notifiable work is defined in schedule 2 of the Standard Plumbing and Drainage Regulation 2003. It includes most plumbing and drainage work performed in existing homes including:

  • kitchen and bathroom additions and renovations;
  • installing or replacing hot water heaters including electric, solar or heat pump hot water heaters;
  • installing fixtures such as toilets, showers and sinks in an existing home;
  • extending or altering pipe work.


For more information on what is considered notifiable works see the Schedule of Notifiable Works on the Department of Housing and Public Works website.

Trade Waste

Trade Waste is liquid waste generated by industry, small business and commercial enterprises. It may have an organic strength many times that of domestic sewage and may overload public treatment facilities.

Trade waste may also contain other substances such as high levels of fats and grease, heavy metals, organic solvents and chlorinated organic substances which sewerage systems are not designed to treat.

In Queensland, the Water Supply (Safety & Reliability) Act 2008 regulates trade waste discharge. Prior to discharging trade waste to council's sewer, the Act requires trade waste generators to obtain approval from Council. All approvals are subject to conditions contained in Council's trade waste policy and are usually valid for a period of no longer than three years.

Isaac Regional Council has implemented a new Trade Waste Environmental Management Plan (TWEMP) (PDF, 900KB). This plan came into effect as of 1st July 2014.

The purpose of this TWEMP is to ensure the continued protection of the environment and waterways within our region.

Council's dedicated Building and Plumbing Compliance Department will assist businesses throughout the process of implementing the TWEMP through ongoing awareness, educational and operational activities and support.

If your business generates any of the above waste, you will need to submit an Application for Trade Waste Approval (PDF, 557KB). 

If you wish to cancel an existing Trade Waste Approval, you will need to complete and submit an Application for Trade Waste Approval. If this applies to you, please fill out our Application to Cancel Trade Waste Approval (PDF, 570KB)

For further information regarding trade waste requirements, please see the Plumbing Fact and Information Sheets box above.

Plumbing Fact and Information Sheets Plumbing Fact and Information Sheets

Plumbing Fact Sheets - ONLINE