Get a licensed plumber for all your work valued at $750 or more.
A compliance certificate must be issued for plumbing work valued at $750 or more (including materials and any appliances, labour and GST).
Only licensed plumbers can purchase and issue compliance certificates. A licensed plumber is not able to issue a certificate for plumbing work that has been carried out by yourself or an unregistered plumber. Your work has to be redone to be compliant at your own expense.