Fitting a mini gas canister: which canister fits which stove?

A canister fitted off its notch or the wrong canister for the stove is behind many cases of a stove leaking gas or failing to light. Before fitting a mini gas canister, you need to know what type of canister it is, which canisters the stove takes and what a correct fit looks like.

What is on the top of a mini gas canister?

Portable gas stoves with the canister fitted at the side or in a separate canister box usually take long cylindrical canisters, commonly known as cassette-type canisters. The top of the canister has three main parts:

• The needle valve in the centre of the top: it opens only when pressed into the stove’s connector.
• The locating notch on the rim of the canister neck: it must line up with the locating ridge on the stove for the canister to sit in the right place.
• The cap: it protects the valve and should only be removed just before fitting.

Which canisters can be used with which stoves?

The most reliable guide is the stove manufacturer’s instructions, which usually state the suitable type of canister. When matching them, check three points:

• Connector type: a stove that takes needle-valve cassette canisters should be fitted with canisters of the same type, such as 220 – 250g butane mini gas canisters.
• Compartment size: 220 – 250g is the familiar size; 120g mini gas canisters are shorter, and some stoves hold them firmly while others do not. Test the fit before buying in quantity.
• Stove type: on stoves with a separate canister box such as the VNG001 portable gas stove, the canister fits into the canister box, which has its own notch and locking lever.

The canister must also be within its expiry date and undamaged — how to check is covered in mini gas canister expiry dates.

Steps for fitting a mini gas canister to a stove

1. Place the stove on a flat surface; turn the knob to the off position and move the locking lever to the open position.
2. Remove the cap and look at the top of the canister: the valve is clean, the neck is not dented and the notch is intact.
3. Turn the canister so that the notch faces the way the stove requires; there is usually a guide mark next to the connector.
4. Push the top of the canister into the connector so that the notch engages with the ridge, and let the body of the canister rest neatly in the compartment.
5. Move the locking lever to the locked position. The lever should snap down smoothly with normal hand pressure; if you have to force it, the canister is not seated in the notch correctly.
6. Pause for a few seconds to listen and smell: only when there is no hissing and no smell of gas should you close the compartment cover and light the stove.

For points to note when cooking and when removing the canister, see how to use a portable gas stove safely.

Signs that the canister and stove do not match

• The locking lever will not snap down, springs back after snapping down, or the canister can still turn or wobble after locking.
• Hissing or a smell of gas at the connection even after refitting the canister the right way round.
• A flickering flame that flares up and dies down, or flames at the canister connection.
• The compartment cover will not close because the canister is too long, too short or misaligned.

If this happens: turn off the knob, release the locking lever, remove the canister, refit the cap and take the canister to a well-ventilated place, away from flames. If the smell of gas has spread through the room, do not switch anything electrical on or off, open the doors to ventilate and leave the area. If the stove will not light for other reasons, see portable gas stove won’t light.

What should you do if the canister will not lock?

1. Remove it, check the direction of the notch and refit it once, without using force.
2. Try another canister of the same type. If the other canister locks, the fault lies with the first one: set it aside and tell the seller.
3. If no canister will lock, suspect a fault in the stove, such as a loose locking lever or a damaged seal: stop using it and take the stove to be checked or repaired under warranty.

If many canisters from the same batch have distorted notches or dented necks, review your source of supply — see spotting low-quality mini gas canisters.

Things you must never do

• Do not force, wedge or tie down the locking lever; do not file down the canister notch or the stove ridge to make them fit.
• Do not use home-made adaptors to fit a different type of canister or to connect a portable stove to a large gas cylinder.
• Do not decant gas from a canister that does not fit into another canister — for the reasons, see can mini gas canisters be refilled.

Frequently asked questions

Written by the VietnhatGas technical and sales team — a batch manufacturer of LPG cylinders. This content is for reference; regulations and standards may change, so please check the current texts.