Gas > Managing Usage > Metering



A Metering Installation Registration Number (MIRN) is a unique number that identifies the supply point. It corresponds with the identification system specified in the Victorian Gas Industry Act, and is frequently referred to by gas retailers and gas fitters to pinpoint where services are to be connected or repaired.


Types of Meters


There are different designs of gas meters in common use based on the type of appliances and the gas consumption you require. 


Gas meters are used at residential, commercial, and industrial buildings that consume natural gas supplied by a gas utility. 


Gases are more difficult to measure than liquids, as measured volumes are highly affected by temperature and pressure.  Gas meters measure a defined volume, regardless of the pressurized quantity or quality of the gas flowing through the meter. 


Temperature, pressure and heating value compensation must be made to measure actual amount and value of gas moving through a meter.


Meter locations


The meter shall be located such that it is readily accessible and in a safe location that permits ease of reading, safe venting, maintenance and replacement. The nominated location should also ensure that the meter is external to any building.


Meter clearances


The gas meter and/or associated assembly (eg regulator, relief valve) shall have minimum clearances from but not limited to, opening windows, doors, source of ignitions, flammable materials, driveways (vehicle movement), other services/utilities assets


The above criteria needs to be met before a meter is connected.


You can refer to standards


AS/NZS 4645.1 - the intent of this standard is to provide for the protection of the general public, gas distribution network operating personnel and the environment, and to ensure safe and reliable operation of gas distribution networks that reticulate gas to consumers.


AS 5601.1 - provides the mandatory requirements and means of compliance for the design, installation and commissioning of gas installations associated with the use or intended use of fuel gases such as natural gas, LP Gas, or biogas.  Legislative changes in 1992 removed the responsibility for inspection and certification of gas installations from the gas suppliers and instituted a regime of gas certification by a person authorised under the Plumbers, Gasfitters and Drainlayers Act 2006.

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