Water, Fuel & Grey Water Bladders

Yes, potable water bladders are completely safe for drinking water when they are specifically designed and certified for that purpose.

In Australia, look for bladders that are AS4020 compliant, which means they have been tested for use in contact with drinking water. Fleximake drinking water bladders meet this standard and are clearly marked as potable-safe (DW product codes).

A proper drinking water bladder for 4WD or caravan use is made from food-grade PVC or TPU materials that:

• Do not leach chemicals
• Maintain taste neutrality
• Withstand heat exposure
• Handle repeated folding
• Survive corrugated-road vibration

It’s important to understand: fuel bladders and grey water bladders must never be used for drinking water. Even after cleaning, they are not considered potable safe.

For serious touring in Australia, a potable water bladder allows you to:

• Increase drinking water capacity
• Store water in tight vehicle spaces
• Pack flat when empty
• Avoid installing permanent tanks

When buying a drinking water bladder, confirm:

• It is labelled potable-safe
• It is AS4020 compliant
• Fittings match your pump or gravity feed setup

If safe drinking water matters (and it always does off-grid), invest in a purpose-built potable water bladder rather than a general-use container.

Choosing the right 4WD water bladder size depends on how long you plan to stay off-grid and how many people are travelling.

As a general rule for Australian touring:

• Allow 5–7 litres per person per day (drinking, cooking, basic washing).

For example:

• 2 people for 3 days = approx. 30–40 litres
• 4 people for 5 days = 100–140 litres

Many travellers pair a Fleximake 60L, 80L or 110L water bladder with existing tank systems to extend capacity without installing permanent tanks.

Flexible water bladders are ideal because they:

• Fit under false floors
• Sit in footwells
• Slide into canopy storage
• Mould into unused cavities
• Pack flat when empty

Unlike rigid water tanks, a low-profile water bladder for 4WD touring adapts to your vehicle layout.

Before choosing a size, ask:

• Where will it sit when full?
• How will weight distribution affect handling?
• Do I need gravity feed or a 12V pump?
• Will I integrate it into my caravan plumbing?

For remote travel in Australia, it’s always safer to carry slightly more water than you think you’ll need.

A quality potable water bladder gives you range flexibility without permanent modification.

Yes, when they are purpose-built and rated for fuel use.

A proper diesel fuel bladder for 4WD touring is constructed from heavy-duty reinforced fabrics designed to safely contain fuel under heat and movement conditions.

Fleximake fuel bladders are compatible with diesel and petrol, provided they are used according to safe fill and venting guidelines.

Fuel bladders offer several advantages over traditional jerry cans:

• Pack flat when empty
• Distribute weight across a wider footprint
• Reduce roof rack load stress
• Quieter during travel
• Easier storage when not in use

For remote Australian touring, Simpson Desert, Kimberley, Cape York, extra fuel range is often essential.

Before purchasing a fuel bladder, confirm:

• Diesel or petrol compatibility
• Reinforced tie-down points
• Safe maximum fill capacity
• Proper transfer method (pump or siphon)

Always:

• Secure the bladder properly
• Avoid overfilling
• Keep away from sharp edges
• Prevent contact with hot exhaust components

A high-quality fuel bladder provides flexible range extension without installing auxiliary tanks.

For serious off-grid travel, it’s one of the smartest upgrades you can make.

Increasingly, yes.

Many caravan parks and free camps across Australia now require grey water containment systems. That means you can’t simply let sink or shower wastewater run onto the ground.

A grey water bladder for caravans or camper trailers allows you to collect:

• Sink water
• Shower water
• Dishwashing water
• Light washing runoff

Benefits include:

• Staying compliant with park rules
• Keeping campsites clean
• Reducing odours
• Easier transport to dump points
• Fold-flat storage when empty

For most caravans, a 20L–40L grey water bladder is sufficient for short stays.

Important:

Grey water bladders must never be used for drinking water. They are designed solely for wastewater storage.

When selecting a grey water bladder, check:

• Hose compatibility
• Outlet valve type
• Easy emptying design
• Durable welded seams

As grey water rules tighten across Australia, having a dedicated grey water bladder keeps you compliant and stress-free when checking into parks or free camps.

For serious touring, yes.

Fleximake (FME) is Australia’s leading manufacturer of premium flexible water, fuel and grey water bladders. Their products are designed specifically for Australian conditions: heat, corrugations, long-distance vibration and remote travel.

Key differences compared to cheaper imports:

• Australian-made manufacturing
• AS4020 potable compliance for drinking water models
• Marine-grade welding processes
• Industrial-grade materials
• Reinforced seams
• Custom vehicle-specific sizing

Cheaper imported water bladders often fail at the welds after repeated corrugated-road use. They may also:

• Retain plastic taste
• Use thinner materials
• Lack certified potable compliance
• Degrade faster in heat

When you’re 500km from the nearest town, reliability matters more than saving a few dollars.

For caravanners, 4WD tourers and off-grid travellers, investing in a quality Fleximake water bladder means:

• Longer lifespan
• Safer drinking water
• Greater durability
• Better performance under load

If your touring setup depends on safe water, extended fuel range or compliant grey water management, it’s worth investing in proven gear once rather than replacing cheaper options repeatedly.