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Converting Gas Appliances

Converting Gas Appliances

When converting gas appliances to either natural gas or propane, there are certain steps in the process you must understand, such as changing internal parts to allow differing pressures between the two gases. However it is also important to know that more commonly, gas appliances have been manufactured only to work with one type of gas.

Remember: When converting gas appliances, gas work is only to be completed by a licensed gas fitter. Never attempt any work on gas or electrical appliances if you are not qualified, it is not only illegal, but also could risk your life, and many others’ too.

Here are some important factors to keep in mind when converting gas appliances.

Many Gases are Not Interchangeable

Gas appliances have been manufactured to work with only one gas type, therefore it is important to never use another gas with your existing appliance. Unless you can confirm it is safe to do so, they are not interchangeable.

  • LPG Gas and Natural gas are not interchangeable.
  • Most appliances are only designed to use one type of fuel, however certain types of water heaters, ovens, ranges and heaters that are able to be converted to a different gas will be labeled accordingly and will come with a conversion kit.
  • Appliances today are designed to only use one type of gas, however if an appliance is able to be converted, the appliance will clearly state this.

More Oxygen is required for LPG

The ratio of oxygen to gas required for proper combustion is around 25 to 1, however natural gas requires around 10 to 1. This difference means that LPG is typically provided in smaller quantities, but at a higher pressure, drawing more oxygen with it to the burner.

Gas Injector or Jet

An LPG gas injector has a smaller aperture hole, reducing the gas introduced to the burner. Whereas a natural gas injector has a larger opening.

Other steps involved

Aside from these factors, there are other compenents to consider when converting gas, which include:

  • Different incoming pressure
  • Ensuring the original design is enabled for both gases
  • Pressure adjustments – internally

Here are just some of the important factors to consider prior to converting gas pressure, always refer to the Australian Codes and Standards when completing gas work and  ensure all conversions of gas appliances are always be completed by a qualified gas fitter, never attempt to do gas or electrical work if you are unlicensed.


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