Drainage plumbing diagrams

Drainage Plumbing Diagram fees

A $10.50 fee will apply to the purchase of Drainage Plumbing Diagrams shortly. This page will be updated with an official start date in the coming weeks.

Go to the 'Search for a drainage plumbing diagram' website Click here for the search

Drainage plumbing diagrams (also known as flimsies or as constructed diagrams) are a diagrammatic representation of a property’s drainage plumbing work.

Drainage plumbing diagrams are regularly used by homeowners, licensed plumbing contractors and others to determine the layout of drainage plumbing on a property. Knowing the layout of drainage plumbing can assist in:

  • Identifying where additional connections to existing drainage plumbing may be made;
  • ensuring that new buildings or extensions do not interfere with existing drainage plumbing;
  • ensuring that any excavation works do not disturb the drainage plumbing;
  • the repair of drainage pipework; and
  • clearing blocked drains.

Requesting drainage plumbing diagrams

Drainage plumbing diagrams are available from the ‘Search for Drainage Plumbing Diagrams’ web page.

If anyone has any issues with internet access, they may contact the Building Commission on 1300 48 90 99 for assistance in accessing drainage plumbing diagrams.

In order to test the drainage plumbing diagram service, the Building Commission will be providing drainage plumbing diagrams free of charge initially. Once the service is fully operational, drainage plumbing diagrams will only be available on payment of a fee.

Issues with drainage plumbing diagrams

As we are dealing with historical records, there may be occasions where drainage plumbing diagrams are not suited for the purpose of determining the layout of drainage plumbing at a property. Some issues that may occur include the property address being recorded incorrectly, insufficient detail being included on the drainage plumbing diagram or the diagram being poorly scanned. If you identify any issues, please email the Building Commission at dpd@dmirs.wa.gov.au and include a brief comment on the issues identified as well as a copy of the drainage plumbing diagram that was downloaded.

After hours emergency requests

The drainage plumbing diagram web service will be available 24/7. However, in emergency situations outside business hours (8:30 am to 4:30 pm business days) where the service cannot be accessed, the Water Corporation may be contacted on 13 13 75.

Submitting drainage plumbing diagrams

Licensed plumbing contractors are required to submit a drainage plumbing diagram when they are the responsible person for drainage plumbing work that involves the installation, alteration or extension of drainage plumbing.

The drainage plumbing diagram should be submitted with the related certificate of compliance, which is required to be provided to the Plumbers Licensing Board (the Board) within 5 working days after the day on which the work is completed.

Further information on submitting drainage plumbing diagrams, including what should be included on the drawing, is available in the Drainage plumbing diagrams: Submissions and requests guidelines. The Drainage plumbing diagrams templates available below contain fields for the required information as well as room for the drainage plumbing diagram is also available.

A4 – Drainage plumbing diagrams template
A3 – Drainage plumbing diagrams template

Further information

A Frequently Asked Questions handout is available. If you still have any queries, please contact the Building Commission on 1300 48 90 99.


If you would like to provide feedback on the drainage plumbing diagram process please email dpd@dmirs.wa.gov.au.

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