Diesel & Petrol Marine Fuel Tanks and Water Storage Bladders
Flexible bladder tanks for boats, yachts, launches and work vessels. Add fuel range or fresh water by using space a rigid tank can't, like under-deck voids, lockers and cockpit floors.
More range without a refit
Fitting a new rigid tank on a boat usually means cutting, glassing and lost space. A Fleximake bladder tank takes the shape of the space it sits in, and rolls up when you don't need it.
Use space you can't use now
Bladders can be made to your exact measurements, so awkward under-deck voids, lockers and cockpit floors become extra fuel or water storage.
Extra range for longer trips
Carry spare diesel for long passages, remote fishing trips and delivery runs, then drain and stow the bladder for day trips.
Built for harsh conditions
Military-grade fabrics and high-strength fittings, with high tensile strength and resistance to tears, punctures and abrasion. Materials are sourced to international standards with full traceability.
One bladder type for each job
Fleximake makes fuel-safe and potable bladders in different materials. Tell us what you're storing and we'll match the fabric and fittings to it.
Standard marine fuel bladders
Pillow-type diesel bladders in stock sizes, ready to go without waiting for a custom build.
- 12 to 1000 litres
- 1200GSM reinforced TPU, rated for diesel, petrol and chemicals
- Tie-down points to secure the bladder on deck or below
- 2-year manufacturer's warranty
Pillow Type Diesel Fuel Bladder Tank 50L – FB50SP
Tender and small launch size.
$443.50
Pillow Type Diesel Fuel Bladder Tank 150L – FB150SP
Extra range for trailer boats and launches.
$726.50
Pillow Type Diesel Fuel Bladder Tank 300L – FB300SP
Long passages and delivery trips.
$1,157.50
Pillow Type Diesel Fuel Bladder Tank 500L – FB500SP
Larger vessels and work boats.
$1,453.00
Water on board
Extra Heavy-Duty Box Type Water Bladder 200L – DW200B – Potable TPU
Extra heavy-duty potable TPU, 200 L.
$629.50
Box Type Drinking Water Bladder 40L – DW40B
Compact drinking water for smaller boats.
$279.50
Grey Water Bladder 40L – Caravan, Camper & 4WD – GW40BLP
Collapsible 40 L grey water holding.
$272.00
Made to fit your boat
Fleximake has built fuel-safe custom bladders for projects around the world. Here's how a custom bladder comes together.
Measure the space
Send us the dimensions, photos, and what you want to store.
Design and quote
Shape, fabric and fittings are specified, with fittings matched to your pump.
Made in Australia
Fleximake builds your bladder at its factory in Victoria.
Delivered ready to fit
An underlay is included as standard, and a UV protection sheet is available.
Mining, industrial and emergency storage
The same bladders are used on mining, marine and industrial sites for temporary storage of fuels, chemicals and waste liquids like effluent, slurry and oil.
Industrial water storage
Large-capacity bladders for farms, construction and remote sites.
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Find out more → FleximakeThe full Fleximake range
Water, grey water and diesel bladders for 4WD, RV and marine.
Explore →Sold and supported by TowPro
TowPro Group is the New Zealand distributor for Fleximake. We're a family-run business in the Waikato with an engineering and coachbuilding background, so we'll give you straight advice on what will work on your boat.
Sizing help
Send us the measurements of your space and we'll suggest a standard size or quote a custom one. Get sizing help →
Nationwide delivery
Standard bladders ship from our Waikato base to anywhere in New Zealand. Shop now →
Talk to us
Marine dealers, boat builders and trade enquiries welcome. +64 27 786 9776 · info@towprogroup.co.nz
Good to know
Can I store petrol in a fuel bladder?
Yes. The standard pillow-type fuel bladders suit diesel and petrol. For jet fuel, aviation fuel or other specialty fuels, please contact us first so we can confirm the right material and fittings.
How is a bladder secured on a boat?
Standard fuel bladders have built-in tie-down points so they can be strapped down on deck or below. For custom bladders, we can plan the fittings and tie-down positions around your boat.
Can a bladder be made to fit an odd-shaped space?
Yes. Custom bladders can be made to your exact measurements, including shape, fittings and fitting positions. Send us the dimensions and photos of the space for a quote.
What warranty do they have?
Standard Fleximake fuel and water bladders carry a 2-year manufacturer's warranty. Claims in New Zealand are handled through TowPro.