My name is Neil, and today I want to talk about a simple but very important item that many of us rely on in daily life, jerry cans. Whether you are on a farm, camping, driving long distances, or preparing for an emergency, these containers are a trusted way to store and transport fuel, water, and other liquids. In this blog, I’ll explain some of the most common mistakes people make when using jerry cans, and how you can avoid them. At the end, I’ll also recommend a reliable place where you can get quality jerry cans in New Zealand.

Why the Right Jerry Can Matters

Jerry cans have been around for decades, and they remain popular because they are practical and durable. But choosing the wrong type, or using them incorrectly, can lead to safety risks, wasted product, or even environmental harm.

For example, a fuel-grade can is not suitable for storing drinking water, and a food-grade water can should not be used for petrol. These differences matter, and yet many people still mix them up. That is why understanding how to use jerry cans correctly is so important.

By knowing what to avoid, you can make sure your jerry cans last longer, stay safe to use, and protect both your health and the environment.

Mistake 1: Using the Wrong Type of Jerry Can

One of the most common mistakes is simply grabbing the nearest can without checking if it is fit for purpose. There are fuel-grade jerry cans designed for petrol or diesel, food-grade water cans for safe drinking water storage, and heavy-duty cans for chemicals.

If you use the wrong type, you risk contamination. Fuel stored in the wrong can could leak or damage the container. Water stored in a fuel can will be unsafe to drink. The solution is simple: always check the label and make sure the can is certified for its purpose.

Mistake 2: Overfilling the Can

It is tempting to fill a jerry can right to the top, but this is unsafe. Liquids expand when the temperature changes, and if the can has no space for that expansion, pressure can build up. That pressure may lead to leaks, spills, or damage to the container.

A good rule of thumb is to leave a little space at the top of every can. Most cans are designed with a fill line or headspace for exactly this reason. By following that, you avoid unnecessary mess and risk.

Mistake 3: Poor Ventilation When Filling or Pouring

Another mistake is using jerry cans in enclosed areas. Fuel cans, in particular, give off fumes that can quickly build up. These fumes are not only unpleasant but can also be harmful or flammable.

The safer way is to always fill or pour from a jerry can in an open, well-ventilated space. Outdoors is best. This keeps you safe from fumes and reduces the chance of fire.

Mistake 4: Ignoring Seals and Caps

Seals and caps are easy to overlook, but they are crucial. A worn-out cap or cracked seal can turn into a big problem. Fuel or water could leak out, and in the case of fuel, it also means fumes escaping.

It pays to check your jerry cans regularly. Replace seals and caps as soon as you notice wear. Many suppliers also sell spare parts, so it is not difficult to keep your cans in good shape.

Mistake 5: Storing in the Wrong Place

Jerry cans need to be stored carefully. Leaving them in the sun, near heat, or inside a hot vehicle can cause swelling, leaks, or damage. For water cans, sunlight can also encourage bacteria growth.

A better option is to keep your cans in a cool, shaded, and secure area. Make sure they are away from sparks or open flames. This extends their lifespan and keeps your liquids safe.

Mistake 6: Not Securing Cans During Transport

Loose jerry cans in a car, ute, or trailer are a recipe for disaster. They can tip over, spill, or even roll into dangerous positions while driving.

The simple fix is to strap them down or use proper holders. Many racks are designed specifically for jerry cans and make transport much safer.

Mistake 7: Forgetting to Clean and Rotate

Jerry cans, especially those used for water, need regular cleaning. Residues, algae, or rust (in older metal cans) can build up over time. If not cleaned, this contamination can make water unsafe or reduce fuel quality.

The best practice is to rinse cans after each use, let them dry fully, and rotate stored supplies so liquids are not sitting for too long. This keeps your jerry cans fresh and ready to use.

Jerry cans are a simple yet essential tool. But as we’ve seen, small mistakes like overfilling, poor storage, or ignoring the right type of can lead to big problems. By avoiding these seven common errors, you’ll make your jerry cans last longer, protect your liquids, and stay safe.