The best way to tell if your gas bottle is empty is to have a look at the tare disk. If you look at the top of the gas bottle surrounding the outlet valve, you’ll see a circular aluminum disk. This shows the weight of the gas bottle when it doesn’t contain any gas and is displayed as two numbers either side of each other - in pounds (to the left) and ounces (to the right). Convert this into kilograms (kg) to find out the weight of your gas bottles when it’s empty. If you have a Cube Gas bottle, the tare weight is already shown in kilograms.

For example: let’s say you’ve bought a 13kg Patio gas bottle. You’ve seen that the tare weight reads 32 pounds, so you convert this to 14.5kg. So, when your gas bottle reaches 14.5kg, it’ll be empty.

See the table below of maximum tare weights by cylinder size: