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The Western Australia guide to standards and tolerances 2019 (the Guide) has been developed for use by builders and building owners as a convenient reference for acceptable standards of workmanship in residential building construction; it is intended to address areas that are not prescribed under legislation or under a home building contract.

As a subcontractor, it is your responsibility to fully understand your rights and obligations in the relationship with your head contractor under contract law, before you enter into any subcontracting arrangement.

Sets out the requirements for the design, installation and commissioning of heated water services using drinking water or rainwater or a combination thereof; includes aspects of the installation from, and including, the valve(s) on the cold water inlet to any cold water storage tank or water heater and the downstream fixtures and fittings; applies to new installations as well as alterations, additions and repairs to existing installations.