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Frequently Asked Questions

About LPG

What is LPG?

There is a lot more to LPG than you might think.

Please see What is LPG?

What are the physical properties of LPG?

Properties of LPG including specific gravity, boiling point, vapour expansion, energy content, combustion facts, flame temperature, flash point & more…

Please see LPG Gas Physical Properties

Where does LPG come from & how is it made?

Learn about the sources and the production process for LPG.

Please see Where LPG Comes From & How is it Made

What are the LPG conversion values: KG, Litres, MJ, kWh & M³?

Unlike water, 1kg of LPG does NOT equal 1L of LPG. Use the handy conversion table that includes all common gas bottle sizes.

Please see LPG Conversion Value Chart for KG, Litres, MJ, kWh & M³

What is the difference between LPG and natural gas?

LPG and natural gas are similar but not interchangeable.

Please see Comparison: LPG & Natural Gas, Propane, Butane, Methane, LNG & CNG

What is LPG used for?

The uses for LPG are in the hundreds, if not thousands.

Please see Uses of LPG

Who discovered LPG and when?

Learn the history of LPG.

Please see History and Origin of LPG Gas

What kind of quality control is there for LPG?

The LPG you get is of the highest quality, as LPG quality problems are rare. Find out how it’s done.

Please see LPG Quality Assurance – LPG Standards & Testing

Why is a gas flame blue?

Please see The Importance of a Blue Flame

What is the difference between LPG and Propane?

Please see Propane & LPG – What’s what?

What is the difference between liquid and vapour LPG?

Please see Liquid vs Vapour LPG – Learn the Difference

What is a Megajoule – MJ?

Please see A Megajoule or Mj Probably Isn’t What You Think

Is LPG used to fuel motor vehicles?

Yes, but it is different, as the Propane may be blended with Butane. This is commonly known as Autogas.


New to LPG Gas Questions

How do I operate a home LPG gas system?

Please see the information you need to know if you are a New User of Home LPG

How do I know which LPG gas supplier to choose?

Please see How to Compare LPG Gas Suppliers

How do I add LPG to my all-electric home and how much does it cost?

To add LPG to your home, you engage a licensed gas fitter to install the gas regulator, changeover valve and the “pigtails”.

The gas fitter also connects the gas line from the regulator to your appliance(s).

These components and the appliances are your property.

Please see How To Add LPG Gas to Your Home for more details

The cost of the installation includes regulator, valve, pigtails, the gas line to the appliances and the cost of the gas fitter’s labour.

The cost will vary by the length of the gas line required between the regulator and the appliances and the individual gas fitter.

The cost of having a gas fitter install gas is typically in the $550 to $900 range.

You do not need to buy gas bottles. Elgas owns and provides the gas bottles. There is a small annual service charge that is typically less than $50 for the average gas bottle.

Please also see:

How to Switch to LPG Hot Water for Your Home

How to Add an LPG Heater to Your Home

How to Add a Gas Fireplace to Your Home

How to Add LPG Gas Cooking to Your Home

How reliable is Elgas LPG?

Elgas prides itself on its Surety of Supply.

Elgas has flexible access to many LPG sources, including imports, to help maintain supply security.

Our main supply terminals include a dedicated facility at Dandenong, in Victoria, and an LPG storage cavern at Port Botany in Sydney.

We also have Australia’s largest fleet of LPG delivery vehicles to ensure a continuous flow of LPG to and through the Elgas supply network.

Where is Elgas LPG available?

We supply LPG to most parts of Australia through strategically located depots and Customer Service Centres that provide localised service.

Gas Bottle & Regulator Questions

Gas Bottles – What are gas bottles?

Gas bottles range from small portable cylinders to large tanks and bulk storage vessels. LPG gas bottles are typically steel vessels for storing the common LPG gases, propane or butane. Homes and small businesses typically use either a 45kg gas bottle, 90 kg gas bottle or the larger 210kg LPG gas bottle sizes (gas cylinder sizes) and cylinder capacity.

High volume users have the larger LPG gas tank sizes (LPG tank sizes).

BBQ gas bottle sizes come in 4kg & 9kg gas bottle dimensions, cylinder capacity & gas bottle sizes (propane gas bottle sizes). Small LPG gas bottles are portable, as used in camping.

What size gas bottles or cylinders do I need for my home?

Please see LPG Gas Bottle-Cylinder Sizing for Homes

Are there restrictions on where gas bottles can be located?

Yes. There are exclusion zones based on wall openings, drains and ignitions sources to determine how far or how close a gas bottle-cylinder can be.

Ignition sources include air conditioners and other electrical items as well as your BBQ and patio heater.

Please see LPG Gas Bottle-Cylinder Placement Guide with helpful diagrams

What does a gas regulator do and what about all the gas fittings?

Please see Home LPG Gas Regulators and Fittings

What are POL Valves and POL Cylinders?

Please see POL Valves & POL Cylinders Explained

Why does ice form on gas bottles and regulators?

Please see Ice and Condensation on Gas Bottles & Regulators

Ordering Questions

What options do I have for ordering my LPG?

Please see 6 Fast & Easy Ways to Order Home LPG

Are there any special offers for new customers?

Yes, we offer new customers an LPG Gas Bottle Welcome Package that includes $80 worth of gas account credits.

Managing Supply Questions

LPG Gas Home Delivery Rules of Thumb – Guidelines

Please follow these simple LPG gas home delivery rules of thumb or guidelines to help ensure problem-free delivery:

  • Delivery is free in most areas.
  • The pathway to the gas bottle installation area must be free of obstructions, including access to your driveway.
  • Unlock gates so that the driver has access to the gas bottles
  • Keep dogs and other animals restrained
  • Order a replacement cylinder as soon as one runs out
  • Plan ahead based on the delivery schedule to your area
  • Please let us know about extra house guests or additional gas appliances, as your consumption may rise
  • Order early when it gets cold, leaving extra time for delivery
  • We offer free delivery in most areas on LPG 45kg gas bottle delivery and tanker refilling

How is my home LPG delivered?

Elgas has two methods of delivering LPG to your home:

Automatic Tanker Delivery: Exclusive to Elgas, EasyGas™ involves delivery via state of the art tankers, which refill your cylinders on site.

You won’t have to remember to order LPG and there’s no more replacement of cylinders.

Elgas monitors your usage and schedules regular tanker deliveries to suit your needs.


Cylinder Exchange Program: In cases where we are unable to deliver via tanker, we deliver cylinders to your home.

Ideally, with two cylinders connected, we’re able to replace one, when empty, ensuring you always have enough supply.

Please see more details of Your LPG Gas Supply Options

How do I check how much gas is left in my gas bottle?

For detailed instructions see How Much Gas is Left in the Gas Bottle

How can I make sure I don’t run out of gas?

Please see Tips for Not Running Out of Gas so you never run out again!

Why do I need two gas bottles?

Please see 2 Gas Bottles are Better than 1

How long should a 45kg gas bottle last?

For a reference chart with examples for various appliances and for multiple appliance homes:
Please see How Long Do 45kg Gas Bottles Last

Can a 9kg BBQ gas bottle be used in place of a 45kg bottle?

If they run out of gas, some homeowners try to connect a 9 kg BBQ gas bottle as a temporary measure.

Elgas does NOT recommend this practice, as it can be very hazardous.

Customers should contact Elgas in all out-of-gas situations.

What should we do if we are moving?

Please see FAQs for Moving Home with LPG Gas when you are ready to move

Safety Questions

Is LPG dangerous?

If used and handled in accordance with prescribed procedures LPG is safe.

As with electricity, natural gas, petroleum and other household chemicals, care should always be taken when using LPG.

Elgas has established an unrivalled reputation for safety, from regular compliance checks of your cylinders to the comprehensive safety and maintenance schedule of our tankers.

Our LPG Gas & Safety page provides detailed information.

Why does LPG have an odour?

Please see The Smell of Safety – Odourised Gas

Why do gas bottles have to remain upright?

Gas bottles must be used and stored upright for safety reasons.

All home and BBQ gas bottles are fitted with pressure relief valves, which are designed to safely release gas in the event that the gas bottle becomes hot and the pressure becomes too great.

The pressure relief valves are incorporated into the main valve, which is at the top of the bottle.

Inside the bottle, the LPG exists as a liquid at the bottom and gas vapour at the top. Keeping the bottle upright ensures that the safety valve is not immersed in the liquid and is located in the vapour space, as it is not designed to vent liquid.

Can an LPG gas bottle be used inside a home?

Please see Indoor Storage of LPG Gas Bottles

Are gas heaters safe?

Yes, when used according to the manufacturer’s instructions.

Also, please see 25 LPG Gas Heater Safety Tips

What are the special gas heater requirements in Victoria?

Please see Victoria Gas Heater Regulations explained

What do we do in the event of a bushfire?

Please see LPG Bushfire Safety

Where do I find an MSDS for LPG?

LPG Material Safety Data Sheet

Price Questions

Why does the price of LPG vary from time to time?

The price of LPG varies on a monthly basis based on a range of international and local market factors.

Please see Australian LPG Pricing Explained

What is the “Service Charge” and what is it for?

Please see Service Charge Explained

Why is the price of Autogas lower than the price of LPG for my home?

Autogas is typically a different type of gas, with a percentage mix of Butane. But the pricing is mainly based on the volume used.

Service stations purchase their LPG in large volumes, storing up to 65,000 litres at a time and refilling frequently.

The cost of delivery is also VERY different.

With Autogas, we can deliver an entire tanker full of gas within a couple of hours.

With home delivery, that same amount of gas could take many days to deliver.

Also, remember that with Autogas, you go to the gas and you provide the labour to fill your tank instead of having the gas brought to your home and having someone else do the filling.

Payment Options

Does Elgas offer online transactions?

You can access our Online Services that allows you to source your up-to-date account information, order gas and make online payments, check delivery dates, leave special delivery instructions and more.

No special password required for residential customers. Just enter your customer number and surname and you are ready to go!

What options do I have for paying my Elgas invoices?

Convenient options including Direct Debit, Online, BPAY, Pay-By-Phone, pay at Australia Post, Pay-By-Mail or pay in person at your local branch.

Please see Your LPG Gas Payment Options

Appliance Questions

Why are gas appliances test certification labels important?

Please see Gas Appliance Certification & Labelling

What do gas appliance Star Ratings really mean & how do you use them?

Please see Star Ratings for Gas Hot Water Heater Systems or

Star Ratings for Gas Heaters, Gas Wall Furnaces & Gas Fireplaces

What gas appliance maintenance is needed and how often?

Please see Gas Appliance Maintenance & Service Guide

How do I connect & disconnect gas bayonet fittings?

Please see Connecting & Disconnecting Gas Bayonet Fittings

What are the different kinds of gas heaters?

Please see Gas Heater Reviews by Type & Price

What are the different kinds of gas fireplaces?

Please see Gas Fireplace Reviews by Type & Price

What is the difference between flued & portable heaters?

Please see Comparing Flued and Unflued Gas Heaters

What is the difference between Tankless Continuous Flow Hot Water and Traditional Hot Water Tanks?

Please see Tankless Continuous Flow Hot Water vs Traditional Hot Water Tanks

What size gas heater do I need?

Please see Gas Heater Sizing Facts

How do gas heaters compare to Reverse Cycle Heating (heat pump)

Please see Gas Heat vs Reverse Cycle Heating

What size gas hot water system do I need?

Please see Gas Hot Water System Sizing Facts

How Does a Tankless Water Heater Work?

Please see Tankless Water Heaters Explained

Can I use LPG in natural gas appliances or vice-versa?

No. Gas appliances are manufactured for use with only one gas and will not work safely with the other gas.

Never attempt to connect a gas appliance to the wrong type of gas, as it can be extremely hazardous.

However, in many cases, they can be converted.

Where can I find quality LPG appliances?

Elgas offers a broad range of LPG appliances from leading manufacturers like Rinnai, Bosch and Paloma. You can browse through our entire range with our Online LPG Gas Appliance Catalogue.

Also view our BBQ Gas FAQs

Didn’t find your answer? Ring our friendly customer service team on 131 161