Jerrycans are a staple of practical preparedness, outdoor adventures, and everyday practicality. From emergency fuel reserves to reliable portable water sources, jerrycans provide a simple, effective solution for storing and transporting liquids. This comprehensive guide explores their history, the different types available, safety considerations, and how to choose, use, and maintain Jerrycans in a way that keeps you safe, compliant, and well-prepared.
What Are Jerrycans? Origins, Purpose and Everyday Use
The term jerrycans describes sturdy containers designed to carry liquids, primarily fuels and water. Their distinctive design—rectangular shape, with a single handle and a secure cap—emerged during the Second World War to facilitate efficient air and ground operations for fuel transport. Over the decades, their robust construction, leak‑resistant caps, and vented spouts have made them a versatile accessory for motorists, campers, emergency responders, and households. Modern Jerrycans come in a variety of materials and capacities, but the core purpose remains unchanged: to safely store and move liquids from place to place with minimal fuss.
For anyone planning road trips, DIY projects, or remote work where fuel or water needs to be transported, understanding jerrycans is essential. The right canister ensures not only convenience but also safety and compliance with relevant regulations. In addition to fuel and water, some users employ Jerrycans for non-potable liquids, waste collection, and other specialised tasks, but it is crucial to select the appropriate material and design for each application.
Types of Jerrycans: Plastic vs Metal
Choosing the right type of jerrycans begins with material. Both plastic and metal variants offer distinct advantages and some drawbacks. Understanding these differences helps you tailor your purchase to your needs.
Plastic Jerrycans: Lightweight, Versatile, and Corrosion‑Resistant
Plastic jerrycans are typically made from high‑density polyethylene (HDPE) or similar polymers. They are lighter than metal counterparts, resistant to many chemicals, and relatively inexpensive. Plastic cans are ideal for water storage, dilute fuels, or situations where weight matters (for example, for hikers or campers who must carry gear over uneven terrain). Modern plastic cans often feature UV stabilisers to reduce degradation from sunlight, which is important for outdoor use.
Considerations with Plastic Jerrycans include ensuring compatibility with the liquid being stored. Some fuels can permeate or degrade certain plastics over time, so look for cans rated for petrol, diesel, or aviation fuel as appropriate. A well‑designed plastic can features robust caps, a secure venting system, and smooth interior surfaces to minimise residue and odour.
Metal Jerrycans: Strength, Durability, and Fire‑Resistance
Metal jerrycans — typically steel or aluminium — offer exceptional durability and heat resistance. They are popular for heavier fuel storage, long‑term resilience, and environments where physical impact is more likely. Metal cans can be safer in terms of puncture resistance and often demonstrate a longer service life with proper maintenance. However, metal cans can be heavier and may be more prone to corrosion if not properly coated or maintained, especially in salty or humid climates. Venting systems are also crucial with metal cans to prevent pressure build‑ups during temperature fluctuations.
When storing fuels in metal cans, it’s essential to use the correct type for the specific liquid and to check for any galvanic interactions with lids, spouts, or other components. A well‑made metal can will feature a secure cap with a tight seal, a reliable vent, and ergonomic handles for safe pouring.
Fuel Cans vs Water Cans: What to Use and Why
One of the most important distinctions for jerrycans is whether they’re designed for fuel or water. The wrong type of canister can lead to contamination, odour, and safety hazards. Here are the key differences to consider.
Fuel Cans: Designed for Petrol, Diesel, and Other Fuels
Fuel‑specific jerrycans are built to resist fuel permeation, have secure venting, and employ materials rated for hydrocarbon exposures. They should be clearly labelled for fuel use and often feature caps and spouts that minimise spills. When using fuel cans, always keep them away from open flames and heat sources, and ensure proper grounding when transferring fuel to avoid static discharge.
Water Cans: Safe for Tap, Spring, and Purified Water
Water‑only jerrycans prioritise cleanliness, odour resistance, and a non‑reactive interior. They are typically colour‑coded or include clear labelling to avoid accidental fuel storage. For water storage, consider the ease of cleaning and the ability to prevent algae growth or sediment buildup. If you use a can for potable water, typically a dedicated water can is preferred to avoid cross‑contamination with fuel residues.
Materials, Build Quality and Design Features in Jerrycans
The longevity and usability of jerrycans depend on thoughtful design elements and build quality. Here are features to look for when shopping, and what they buy you in practice.
Cap Design and Spout System: Spill Prevention and Control
A well‑designed cap system is critical for avoiding leaks. Look for screw‑top caps with robust seals, often accompanied by a child‑proof or locking mechanism in professional settings. Spouts should be easy to use, allow controlled pouring, and be compatible with the cap. A vented cap can help equalise pressure during pouring, reducing glugging and spillage.
Ventilation: Preventing Pressure Build‑Up
Even when not filled to the brim, temperature changes can create pressure inside a can. Venting systems are therefore essential for safety, particularly in hot vehicles or direct sunlight. Some designs use vented caps or a small secondary vent to manage pressure while maintaining a secure seal.
Handles and Ergonomics: Easy Lifting and Pouring
Carrying capacity is a key consideration. Handles should be sturdy and comfortable, positioned to distribute weight evenly. For larger capacities (20 litres or more), dual handles or a top handle with a supportive grip can reduce strain and improve pouring control. Ergonomic design significantly reduces the risk of spills during transfer.
Interior Finish and Cleanability
A smooth interior finish helps prevent residue buildup and makes cleaning easier between uses. This is especially important for water storage and for cans used with a range of fuels. Some manufacturers offer interior coatings that resist odours and staining, prolonging the usable life of the container.
Safety Considerations When Using Jerrycans
Safety should always be front and centre when handling jerrycans. The wrong approach can lead to burns, fires, or environmental harm. Here are essential safety guidelines to follow.
Flammability and Venting
Flammable liquids demand careful handling. Keep fuel cans away from heat sources, and never leave them in a vehicle where heat could build up. Use properly rated spouts and caps, and ensure ventilation during filling and dispensing to avoid the accumulation of fumes.
Storage and Flammability Compliance
In the UK and elsewhere, there are regulations governing the storage of fuels. Store jerrycans upright, in a well‑ventilated space away from ignition sources, with caps tightly closed. For long‑term storage, use containers designed for fuels and follow any local guidelines about separation from other chemicals or reactive substances.
Transport Rules and Road Safety
Transporting jerrycans in vehicles requires attention to securing the containers to prevent movement during transit. Use appropriate restraints and avoid placing them near heat sources. Ensure caps are tight and that spouts are capped when not in use. When transporting multiple cans, consider spacing and stacking to reduce risk of leakage or damage in a collision.
How to Choose the Right Jerrycans for Your Needs
With a wide range of sizes, materials, and configurations, selecting the right jerrycans involves assessing your specific use case, space, and budget. Here are practical guidance points to help you decide.
Capacity and Sizing
Common capacities include 5, 10, 20, and 25 litres. Smaller cans are easier to handle but hold less fuel or water, while larger cans reduce the frequency of refills but require more lifting and storage space. For a family emergency kit, a mix of 10–20 litre units can balance practicality and practicality.
Material Suitability
Choose plastic for lighter needs or where corrosion resistance is paramount. Metal is preferred where durability and heat resistance are crucial, such as in rugged environments or for long‑term fuel storage. If you require both, consider having a small plastic can for water and a metal can for fuel, clearly labelled to avoid cross‑contamination.
Certification, Compatibility and Brand Considerations
Look for reputable brands with clear product specifications and warnings. For fuels, ensure the can is rated for petrol or diesel. For water, confirm food‑grade or potable water suitability. Certifications and warranty also provide confidence in performance and safety.
Using and Filling Jerrycans Safely
Proper use of jerrycans extends their life and protects you and others from harm. Following step‑by‑step guidelines helps ensure clean, safe, and efficient liquid handling.
Filling and Dispensing Best Practices
Fill cans only to the recommended level to allow for expansion. Avoid filling to the brim; leave space for venting. Use a proper funnel or spout to minimise spills, and keep the cap clean and dry. When dispensing, pour slowly and steadily to prevent splashing, and keep a fire extinguisher nearby when handling fuels.
Cross‑Contamination and Hygiene
Never use a can that previously contained fuel for drinking water, or vice versa, unless thoroughly cleaned and approved for the intended liquid. Rinse cans with appropriate cleaners, and allow them to dry completely before reuse. Dedicated cans for water storage are easier to maintain in domestic settings.
Venting and Pressure Management
Use the venting system correctly to prevent a vacuum or pressure build‑up that can hinder pouring. When temperatures rise, ensure the cap remains in place and the vent is functioning. Do not seal a hot can tightly, as pressure can build inside and cause leaks or damage.
Maintenance and Cleaning: Keeping Your Jerrycans in Top Condition
Regular maintenance ensures your jerrycans perform reliably over time. Cleanliness, proper storage, and routine inspection help prevent odours, residue, and leaks.
Cleaning Procedures for Different Liquids
Water containers benefit from thorough cleaning with mild detergents and hot water, followed by a thorough rinse and air drying. For fuel cans, use appropriate cleaners designed to remove residue and avoid introducing contaminants that could affect fuel quality. Never use strong chemicals that can degrade plastics or metals.
Inspection: What to Look For
Check seals and caps for wear, inspect the venting system for blockages, and look for cracks in the body or corrosion on metal cans. Any signs of damage warrant replacement rather than repair. A small crack can worsen rapidly under pressure or heat, potentially causing leaks.
Lifespan and Replacement Guidance
The lifespan of a jerrycans varies with use, material, and maintenance. Plastic cans may last several years with careful handling, while metal cans can endure longer but may require periodic recoating or inspection for corrosion. If you notice persistent leaks, cracks, or odour that cannot be eliminated, it is prudent to replace the can.
Storage, Transport and Legal Requirements in the UK
Practical storage and responsible transport are essential, particularly in households, vehicles, and small businesses. UK regulations emphasise safety, environmental stewardship, and proper labelling and containment of liquids.
Storage Guidelines for Home and Vehicle Use
Store jerrycans upright in a ventilated cupboard, shed, or garage away from living spaces and heat sources. Use secondary containment if multiple cans are stored together to prevent leakage from reaching floors or drains. Clearly label each can with its contents and date of last use or refilling.
Transport and Carriage Rules
When transporting cans in a vehicle, secure them to prevent movement and potential leakage. Keep caps tightened and spouts capped when not in use. Avoid transporting empty containers loosely, as residual vapours may still be present. In commercial contexts, consult the relevant regulatory guidance on the carriage of hazardous liquids.
Environmental Considerations
Always aim to prevent spills and leaks. If a can is damaged or leaks occur, contain the spill promptly using absorbent materials, and dispose of the liquid and container according to local waste disposal regulations. Reused or recycled cans should be cleaned thoroughly and assessed for safety before reuse.
Accessories and Add‑Ons for Jerrycans
To maximise usability and safety, several accessories complement jerrycans. These enhancements can improve pouring control, security, and compatibility with various liquids.
Spouts, Caps and Lockable Lids
High‑quality spouts allow precise pouring and reduce spill risk. Lockable caps provide additional security for containers stored in public or shared spaces. Look for vented caps to prevent pressure buildup during rapid pouring or hot conditions.
Certification Labels and Colour Coding
Colour coding helps prevent cross‑contamination between fuel and water. Clear, durable labels indicating contents, capacity, and safety warnings improve compliance for households and businesses alike.
Adapters, Pumps and Dispensing Systems
Some setups benefit from pumps or gravity‑fed dispensing systems that speed up transfers and reduce handling risks. Ensure compatibility with your can’s neck and cap thread size to avoid leaks or spills.
DIY Tips and Common Mistakes: Making the Most of Your Jerrycans
Vast experience with jerrycans shows that small adjustments can significantly improve usability. Here are practical tips to help you save time and reduce the risk of mishaps.
Avoid Overfilling and Spills
Avoid overfilling beyond the recommended mark. Leaving space for expansion reduces the chance of leaks when the liquid warms up or is transported. Clean up any spills immediately to prevent odours or residues that could affect future contents.
Never Mix Liquids in a Single Can
Cross‑contamination is a common issue. Use separate cans for different liquids, particularly when switching between fuels or between fuels and water. A dedicated water can keeps taste and odour issues out of your drinking supplies.
Labeling and Organisation
Label each container with the contents, last used date, and hazard warnings. Organisation helps avoid accidental use of a fuel can for water and simplifies routine maintenance and refill schedules.
Innovative Uses for Jerrycans: Beyond the Obvious
The utility of jerrycans extends beyond simple storage. Here are some practical, creative, and budget‑friendly applications that make them indispensable in various settings.
Emergency Preparedness Kits
Store emergency drinking water, spare fuel, or essential liquids for disaster scenarios. Durable cans are reliable companions in home emergency kits, and their portability makes them useful during evacuation or sheltering in place.
Camping and Overlanding
Campers often use lightweight plastic jerrycans for water and spare fuel for generators or vehicles. The ability to pack compactly and pour with accuracy adds convenience to extended trips and off‑grid adventures.
Gardening and Outdoor Work
Watering cans for gardens, portable sprayers, or fuel storage for lawn machinery can benefit from the sturdy design of Jerrycans. In such contexts, clean and well‑labelled containers help maintain safety and efficiency during regular maintenance chores.
Case Studies: Real‑World Scenarios with Jerrycans
Here are concise, practical examples illustrating how people implement jerrycans to solve everyday problems.
Case Study 1: Remote Workshop Power and Fuel Management
A small rural workshop uses a combination of plastic water cans for on‑site sanitation and steel fuel cans for a backup generator. Regular checks, clear labelling, and a dedicated storage cabinet keep them organised and safe, with prompts for periodic inspection and refilling schedules. This approach minimizes downtime and reduces mishaps during service calls.
Case Study 2: Off‑Grid Family Camping Kit
For a family living off the grid, a kit comprising several 10‑ and 20‑litre Jerrycans covers water supply, emergency fuel, and spare lubrication for equipment. Colour coding and robust spouts help children learn safe handling, while the sturdy build ensures long‑term use in variable outdoor conditions.
Frequently Asked Questions (FAQs)
Common questions about jerrycans are answered here to help you make informed decisions and use them safely.
Are Jerrycans safe for storing drinking water?
Yes, provided they are clearly dedicated for potable water, clean inside surfaces, and maintained properly. Use only water‑approved containers for drinking water, and ensure they are thoroughly cleaned between uses that involve other liquids.
Can I store petrol in a plastic Jerrycan?
Only if the can is rated for petrol. Use purpose‑built petrol cans and ensure they are never used for water or other liquids. Inspect caps, vents and seals regularly to maintain safety.
What is the best capacity for home use?
A practical approach is to have a mix of 5–20 litre cans, depending on space and needs. For home emergency planning, a few 10–20 litre cans can provide adequate resilience without creating a heavy storage burden.
How should I dispose of damaged Jerrycans?
Do not puncture or burn damaged containers. Follow local waste disposal guidance for hazardous materials and recycle where possible. If in doubt, contact your local council for disposal recommendations.
Conclusion: Investing in the Right Jerrycans for Peace of Mind
Jerrycans offer a straightforward, reliable solution for storing and transferring liquids, whether fuel, water, or other compatible substances. By understanding the differences between plastic and metal variants, selecting the correct type for your needs, prioritising safety and maintenance, and using proper storage and transport practices, you equip yourself with a practical tool that delivers lasting value. The right jerrycans—carefully chosen, properly used, and well maintained—provide not only convenience but confidence in daily living, outdoor ventures, and emergency preparedness alike.