Australian Standard AS D8 - 1971 Hose Couplings for Use with Vacuum and Air-Pressure Braking Systems on Prime Movers, Trailers and Semi-trailers - Western Australia


You will be required to comply with this standard if you intend to operate a B-double or road train. The brake line couplings on the same part of a vehicle in a B-double or road train must be polarised in accordance with this standard.

This Standard specifies the requirements for the design, dimensions and identification of couplings for air-pressure braking systems. Please note that the standard referenced in the legislation has been superseded by AS 4945-2000.

Please consult the Contact Officer to confirm which version of this standard you must comply with, as well the level of compliance that may be required.

Service type

Code of Practice

A code of practice can be either a legal requirement or non-legal requirement. Legal codes of practice are defined as a result of legislation. Non-legal codes of practice are defined by industry regulators and bodies.

Act(s) name

Road Traffic (Vehicles) Act 2012 WA

Regulation(s) name

Road Traffic (Vehicles) Regulations 2014 WA

Administering agency

Department of Transport

Transport Services

Driver and Vehicle Services

Contact details

Contact Email, Phone and Address Details for this service in simple two column table format, header then data.

Enquiries, Vehicle Safety and Standards Section

Driver and Vehicle Services

Transport Services

Department of Transport

Operating address: 21 Murray Road South
Western Australia 6106
Phone: 13 11 56
Fax: 08 9216 3899