Technical notes on plumbing industry topics are issued to assist licensed plumbers to comply with the Regulations applicable to water supply, sanitary and drainage plumbing work in Western Australia.
Each technical note is to be read in conjunction with Part 6 of the Regulations that currently adopt the Plumbing Code of Australia as the plumbing standards with the deemed-to-satisfy Plumbing and Drainage Standard AS/NZS 3500:2021 modified in certain matters to suit the State's building approach and other local conditions.
Current technical notes
Cold water services
Flexible spray hoses (v3 May 2023)
Braided flexible hoses (v4 May 2023)
Pipe sizing and commissioning (v4 May 2023)
Disinfection of storage tanks and water services (v2 May 2023)
Bidet douche seats and toilets (August 2023)
Heated water services
Water heater installations (v5 July 2023)
Plastic pipes to solar water heaters (v3 May 2023)
Heated water pipework (v3 May 2023)
Flow and return lines from solar water heaters (v3 May 2023)
Water heaters and water tanks in roof spaces (v3 May 2023)
Sanitary plumbing
Trade waste applications (v4 September 2023)
Above-ground pipework using drainage principles (v4 May 2023)
Connection of condensate waste to sanitary plumbing and drainage systems (v4 May 2023)
Air admittance valves (AAV) (v5 July 2023)
Reduced velocity aerator stack systems (v2 May 2023)
Drainage plumbing
Boundary traps (v5 July 2023)
Vacuum sewers (v3 May 2023)
Multi-unit developments (v5 May 2023)
Overflow relief gullies and reflux valves (v4 May 2023)
Inspection openings for drainage (v3 May 2023)
Inspection shaft, gully and trap risers (v3 July 2023)
Miscellaneous technical notes
Miscellaneous technical note A – Water services providers conditions of connection; reticulation cut-ins; solvent welded traps; bin wash areas (v3 May 2023)
Miscellaneous technical note B (v3 May 2023)
Specific topics
Support and fixing of pipework (v3 July 2023)
Plumbing Code of Australia (v3 May 2023)
Evaporative air conditioners, waste water drains and water supply (v3 May 2023)
Services to survey strata lots (v4 September 2023)
Pumping apparatus and venting (v3 May 2023)
Junctions in sanitary and drainage systems (v2 May 2023)
Accessible sanitary facilities (v6 May 2023)
Each technical note is distributed to all licensed plumbers with a current email address.
Technical Advice Line
Any questions regarding technical notes can be directed to:
- 1300 360 897
- plumbers.admin@demirs.wa.gov.au
