Elgas LPG Gas Blog

How to Check & Tell How Full a Gas Bottle Level Is - Tell How Much Gas in Gas Bottle

Including "How To" Video

It's an easy how to tell how full a gas bottle level is.

To make sense, it helps to also explain how LPG works

How to Check & Tell How Full a Gas Bottle Level Is - Tell How Much Gas in Gas Bottle

LPG Cylinder Level Indicator - How to Check Gas Bottle Level

The short version of how full a gas bottle level is:

1. Tell how much gas in gas bottle by SLOWLY pouring a large bottle of hot tap water down side of the gas bottle.

2. Run your hand down the same side of a gas bottle and feel for a change of temperature to tell how full a gas bottle level is.

3. A line of condensation may appear as your gas bottle level indicator.

4. If you check and feel no difference, it may be that the checked gas bottle level is empty.

QUICK TIP: More hot tap water (a bucket) makes it easier to check how full a gas bottle level is.

Be careful not to scald yourself with the hot water. Do NOT use boiling water!

See full version of instructions below.

Read more on why this works and for tips & tricks on how to tell how full a gas bottle is…

Did You Know that Your LPG Boils?

LPG is stored under pressure, as a liquid, in a gas bottle.  
It turns back into a gas by 'boiling' into gas vapour.  
This happens at the very low temperature of -42°C. 
To boil, the liquid LPG draws heat from the steel walls of the gas bottle. 
This, in turn, makes the gas bottle feel colder than the ambient temperature.

At the Same Time You Can Get Ice on Your Gas Bottle

Ice on LPG gas cylinderThe gas bottle gets even colder when you are actually using the gas. 
Under the right conditions, when you are using gas very rapidly, ice can even form on the gas bottle!

Check Gas Bottle Level Indicator Explained

Check gas bottle level indicator is the difference in temperature that can be felt on the side of the cylinder when you check or test gas bottle level. The point at which the temperature changes is your LPG cylinder (gas bottle) level indicator for how to check gas bottle level.

This how to check or test gas bottle level works with either 45kg home gas bottles or BBQ gas bottles.

This may be difficult to feel so try the following procedure...

How to Tell How Full a Gas Bottle Level Is - Full Version

The full version of how to tell how full a gas bottle level is:

1.    Do NOT use boiling water, as you would risk scalding yourself. Water from the hot water tap of your home should work fine.

2.    Using care, SLOWLY pour the hot water down one side of the gas bottle.  QUICK TIP: More water is better, as it will make it easier to feel the difference in temperature as you check gas bottle level. I actually fill a cleaning bucket with hot tap water when I check mine. 

3.  A line of condensation may appear as your check gas bottle level indicator.  If not:

4.  Wait a few seconds and then run your hand down the same side of the gas bottle, where you poured the water.

5.  You should feel a change of temperature at the gas bottle level of the gas. 

If you feel no difference, the gas bottle level may well be empty.

Be careful not to scald yourself with the hot water!

QUICK TIP:

The test works even better during or after you use one of your LPG appliances. For example, if you have LPG hot water, do the check or test of gas bottle level right after someone takes a shower.

Pressure Gauges Don't Work to Tell How Much Gas in Gas Bottle

With compressed gas bottles, like scuba tanks, pressure drops as the compressed gas is used, so a pressure gauge will indicate or check the remaining gas bottle level.

However, LPG is not compressed gas, it is liquefied gas. 

The vapour pressure varies with temperature but not with the test of gas bottle level in the bottle.

As LPG is a liquefied gas, the vapour pressure inside the cylinder will remain the same from full gas bottle level until the last of the liquid LPG is vapourised.

So, if your are trying to determine check or test gas bottle level of LPG remaining, pressure gauges don't work.

The following short video (0:48) shows how to tell how full a gas bottle is...

How to Check Gas Bottle Level: The Video (48 seconds)

How Full is a Full Gas Bottle Level?

Also, please remember that gas bottles are designed to be full at 80% gas bottle level or just over 3/4.

This allows for the natural expansion of the gas during warmer temperatures.

For safety reasons, NEVER open the valve on an unattached gas bottle to check for remaining gas, even if you think it is empty.

 Alternative Way to Tell How Full a Gas Bottle Level Is

An alternative way to check or test a BBQ size gas bottle level is by using a scale. 

Disconnect the bottle and place it on a scale, making sure the valve is firmly closed.

The tare (empty) weight of the bottle is stamped on the neck ring.

The difference between the scale reading and the tare weight should indicate approximately how much gas remains in the bottle.

8 Tips for Never Running Out of LPG Gas Again!

We know that there is nothing more inconvenient than being out of home LPG gas. 
Here are a few handy tips, if you are a gas bottle exchange customer, to help you avoid running out:

1.  Always order gas as soon as the first bottle runs out. 

Don't wait until the gas bottles are both empty or near empty. 

Follow this advice and you are virtually assured to never run out of gas.

2.  Remember to order sooner, rather than later, during the busy winter season.

3.  Remember to check your gas bottle level more often in cold weather, especially if you use a gas heater or gas log fire. 

Even your water heater has to work harder in cold weather, as the incoming water is colder.

4.  Having additional house guests can also increase your usage if you have gas hot water. 

Remember to test check gas bottle level more often so both you and your guests avoid cold showers!

5.  If you only have one gas bottle attached to your home, you may wish to consider adding a second gas bottle. 

Unless you are on automatic tanker delivery, you will either run out or have to call for a gas bottle exchange before using up all of your gas. 

These are both situations you would surely like to avoid. 

A second bottle solves the problem and is particularly wise if you use your gas for hot water and/or heating.

6.  If you are an Elgas customer, make sure we have your Mobile Number so you receive Gas Check Alerts by Text (SMS). 

These are sent automatically, by our computer, based on your past gas usage. 

With Gas Check Alerts, you will never forget to check or test your gas bottle level again.

7.  Remember to increase how often you check or test your gas bottle level if you install additional gas appliances.

8.  Also, be certain to tell your supplier if you install additional appliances, especially if you are on automatic tanker delivery, so we can adjust your delivery schedule.

Follow these tips and you should enjoy using of your gas appliances without interruption.

 

 

View More LPG Gas Blogs

Comments, questions or feedback?

Please Email us at: This email address is being protected from spambots. You need JavaScript enabled to view it.

The information in this article is derived from various sources and is believed to be correct at the time of publication. However, the information may not be error free and may not be applicable in all circumstances.