In Australia, all gas work must be carried out by a fully licensed gas fitter for both LPG and natural gas. Upon completion of gas installation, repair and maintenance, your gas fitter will provide you with a certificate of compliance (COC) that shows all gas work meets your state’s requirements.
Your COC provides protection for you if you experience problems with your gas appliance or system later on. If the problem is due to poor workmanship, your gas fitter will need to rectify this for you.
Your gas provider cannot supply uncertified appliances with gas. In order to connect to the gas supply, you will need to provide a COC.
If your gas work is carried out by an unlicensed individual and you don’t receive a COC, the manufacturer’s warranty on that item might be void. Any problems that occur for this item will have to be paid out of your own pocket, regardless of the quality of work.