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If you are looking at flexible liquid storage for your caravan or 4WD setup, you have three main options to consider: a water bladder for drinking water, a fuel bladder for extra range, and a grey water bladder for waste water management. Fleximake makes all three and each one solves a different problem on the road. This guide covers what each type does, which sizes are available and how to decide what your setup actually needs.

Browse our full range of Fleximake water bladders, fuel bladders and grey water bladders at Campalot or read through this guide to understand which type or combination suits your setup.

Why Flexible Bladders Beat Rigid Tanks and Jerry Cans

The advantage all three bladder types share is flexibility, in the literal sense. A Fleximake bladder conforms to the space it is placed in rather than demanding a specific fixed space. When full it takes the shape of its surroundings. When empty it folds completely flat and takes up almost no room.

This makes bladders far more space-efficient than rigid containers. They fit under false floors, in footwells, alongside gear in a canopy or in hull storage on a boat. Places where a fixed tank or rigid jerry can simply will not go. And because Fleximake products are Australian-made with marine-grade welded seams and quality fittings, they are built to handle Australian touring conditions.

Water Bladder: Extend Your Drinking Water Supply

A water bladder stores potable water for drinking, cooking and washing. For caravanners and 4WD tourers who rely on their fixed tank, adding a water bladder extends range without the cost and complexity of installing a second permanent tank.

Fleximake water bladders are made from food-grade, BPA-free materials and are potable-safe. The internal materials are specifically rated for drinking water. They are not interchangeable with fuel bladders. Using a fuel bladder for water, or a water bladder for fuel, is not safe and will void any warranty.

Water Bladder Sizes

• Box water bladders: available from 60L to 200L, priced from $259
• Console Cut-out 105L water bladder: from $319, designed to fit around the centre console
• Transmission hump 125L water bladder: from $339, shaped to fit the transmission hump area in a 4WD
• Heavy duty 110L water bladder: from $329, reinforced construction for rough terrain use

Who Needs a Water Bladder?

• Caravanners heading off-grid for extended periods where water refill points are scarce
• 4WD tourers who want to increase range between water sources without permanent tank installation
• Families doing the Big Lap who need to carry more than their fixed tank allows
• Anyone visiting remote areas where water quality or availability is uncertain

Fuel Bladder: Extend Your Range on Land or Water

A fuel bladder stores diesel or petrol for supplementary use. It is not a primary fuel tank and should never be used as one. Its purpose is to carry additional fuel when you know a long stretch between servos is coming, or when you want the security of extra range without committing to a full jerry can setup.

Fleximake fuel bladders use fuel-compatible internal linings completely different from the materials used in water bladders. Always use the right bladder for the right liquid.

Fuel Bladder Sizes

• 75L fuel bladder: from$319, suits tourers who want meaningful extra range without maximum weight
• 100L fuel bladder: from $359, for serious remote travel where fuel gaps can exceed 600km

Who Needs a Fuel Bladder?

• Remote 4WD tourers crossing long stretches of outback without fuel stops
• Boaties who want to extend their range offshore or to remote anchorages without jerry cans on deck
• Travellers who want the security of extra fuel without the bulk and mounting hardware of multiple jerry cans

Grey Water Bladder: Manage Your Waste Water Properly

A grey water bladder captures waste water from your sink and shower when you are camping at sites without drainage. This keeps you compliant with free camp and RV park rules that require all grey water to be contained and disposed of at designated dump points.

Grey water bladders are not food-safe and should not be used for drinking water storage. They are specifically designed for waste water capture and are an increasingly expected part of any responsible camp setup.

Grey Water Bladder Sizes

• 20L grey water bladder: from $130, suits a couple camping for two to three days
• 40L grey water bladder: from $150, suits families or longer stays between dump point visits

Who Needs a Grey Water Bladder?

• Anyone free camping at sites without sullage drainage
• Travellers visiting national parks and remote areas where grey water disposal rules are strictly enforced
• Caravanners who want to camp responsibly and leave no trace at their sites

Can You Use Multiple Bladders Together?

Yes, and many serious tourers do. A water bladder and a grey water bladder are a natural pairing: one manages your incoming supply and the other captures your outgoing waste. Adding a fuel bladder completes the picture for remote trips where water, fuel and waste management all need to be planned carefully.
Because bladders fold flat when empty, running multiple bladders in a setup does not commit you to carrying the full weight and volume when one or more is not needed.

Storage and Care Tips for All Bladder Types

• Always store bladders specific to their rated liquid type. Do not interchange water, fuel and grey water bladders.
• Rinse and dry thoroughly before long-term storage.
• Store flat in a cool location away from direct UV when not in use.
• Check fittings and seams before each trip. Fleximake bladders are built to last but any flexible storage benefits from a quick inspection after rough travel.
• Secure all bladders so they cannot shift in transit. A full bladder is heavy and needs to be properly restrained.

The Short Version

Water bladder for drinking water, fuel bladder for extra range, grey water bladder for responsible waste management. All three are made in Australia by Fleximake to a standard suited to the demands of Australian touring. Choose the type or combination your setup needs and size up based on how long you plan to travel between refill and disposal points.

  Shop Fleximake water bladders, fuel bladders and grey water bladders at Campalot - Australian-made for caravans, 4WDs and boats.