Onion Tanks | Fire Fighting & Liquid Storage | Made in Australia
Onion Tanks | Fire Fighting & Liquid Storage | Made in Australia
Australian Made & Designed
2 Years Warranty
Customisation
Why Chose Fleximake
Why Chose Fleximake
Quick Specifications
Quick Specifications
Key benefits
Standard capacity range
| Model | Capacity (L) | Base dia. (mm) | Height (mm) |
|---|---|---|---|
| FMOT003 | 3,000 L | 2,300 | 1,000 |
| FMOT005 | 5,000 L | 2,800 | 1,000 |
| FMOT010 | 10,000 L | 3,700 | 1,250 |
| FMOT020 | 20,000 L | 5,000 | 1,250 |
| FMOT030 | 30,000 L | 6,000 | 1,250 |
| FMOT050 | 50,000 L | 7,500 | 1,250 |
| FMOT070 | 70,000 L | 8,800 | 1,250 |
| FMOT100 | 100,000 L | 10,500 | 1,250 |
| FMOT130 | 130,000 L | 12,000 | 1,250 |
Material choices
| Material | Weight (gsm) | Suitable applications | Code |
|---|---|---|---|
| RPVC | 900 | Non-potable water, some chemicals/oils | P09N |
| RPVC Food grade | 900 | Potable water (AS/NZ 4020) | P09P |
| RPVC | 1100 | Non-potable water, certain chemicals/oils | P11N |
| RPVC | 1400 | Heavy-duty chemicals, industrial | P14N |
| TPU | 960 | Potable water (AS/NZ 4020) | TPUP |
| TPU | 1230 | Fuels, oils, certain chemicals | TPUN |
| ER1000 | 1000 | Most chemicals, some oils | ER10 |
Onion tank size guide
| Size range | Typical use | Recommended applications |
|---|---|---|
| 2,000 – 10,000 L | Small scale | Firefighting, emergency water, small sites |
| 10,000 – 30,000 L | Medium duty | Farms, construction, general water storage |
| 30,000 – 50,000 L | Heavy duty | Mining support, dust suppression, industrial sites |
| 50,000 – 130,000 L | Extra heavy duty | Large mining, remote camps, bulk water supply |
| Capacity | Filled weight (water) |
|---|---|
| 10,000 L | ~10 tonnes |
| 30,000 L | ~30 tonnes |
| 50,000 L | ~50 tonnes |
| 100,000 L | ~100 tonnes |
- Water weight: 1 L ≈ 1 kg (10,000 L = 10 tonnes)
- Ensure ground is level and load-bearing
- For fuel or chemicals, weight may vary by liquid density
- Custom sizes available on request
We build custom onion bladders tailored to your exact capacity, dimensions, and fitting requirements. Our team can design a solution that fits perfectly
Onion Tanks | Fire Fighting & Liquid Storage | Made in Australia
General Overview
Setup, Installation & Transport
Durability, Lifespan & Environment
• RPVC: approx. 5–8+ years (water applications)
• TPU: approx. 8–12+ years (potable water, fuels*)
• ER1000: approx. 5–8+ years (chemical use*)
Actual lifespan may vary significantly depending on operating conditions and maintenance.
Liquid Compatibility & Safety
• TPU (TPUN): fuels, diesel, oils*
• ER1000 (ER10): selected chemicals*
• RPVC (P14N): certain industrial liquids*
⚠️ Important:
• Not all liquids are compatible with all materials
• Chemical concentration, temperature, and exposure duration affect suitability
• Written confirmation from Fleximake is recommended prior to use
• Local council regulations
• Environmental protection requirements
• Workplace safety laws
It is the user’s responsibility to ensure compliance with all applicable regulations.
Maintenance, Cleaning & Repairs
Protection, Stability & Use Conditions
System Integration
Ordering & Responsibility
• Required capacity (Litres)
• Intended application (water, fuel, chemical, etc.)
• Preferred material (or request recommendation)
• Required fittings and accessories
Important Disclaimer
• Final suitability depends on correct product selection, installation, and use
• Compatibility with specific fuels or chemicals must be confirmed prior to use
• Users are responsible for ensuring compliance with all relevant regulations and safety requirements
Freight & Delivery
All orders are processed within 1–3 business days after payment confirmation (Monday–Friday).
Orders placed on weekends or public holidays will be processed on the next business day.
Delivery times depend on when your order is placed relative to our cut-off time: 1:00 PM (UTC+10, Sydney/Melbourne).
Once your order ships, you’ll receive a confirmation email with a tracking number.
Estimated Delivery Times by Location:
- Melbourne Metro: 1–3 business days
- Sydney Metro: 1–3 business days
- ACT: 3–5 business days
- Hobart Metro: 4–7 business days
- Adelaide Metro: 4–7 business days
- Perth Metro: 5–10 business days
- Northern Territory: 10–20 business days
- All Regional Areas: 5–10 business days
Returns
If a product doesn’t fit your application or change your mind, you can return it within 30 days of receiving it.
To be eligible:
- The item must be unused and in its original packaging.
- You’ll need a receipt or proof of purchase.
- To start a return, contact us at sales@fleximake.com.au.
- Customers are responsible for return shipping costs.
- All approved returns are subject to a 10% restocking fee.
- Exchanges are accepted — contact us to arrange.
Refunds
- Once we receive and inspect your return, we’ll notify you if the refund is approved.
- Approved refunds are processed to your original payment method within 7–14 business days.
- Bank processing may take additional time.
- If more than 15 business days have passed since approval, contact us at sales@fleximake.com.au
Damages & Issues
Inspect your order upon arrival. Contact us immediately if your item is defective, damaged, or incorrect, so we can resolve it.
Non-Returnable Items:
- Custom products (special orders or personalised items)
- Hazardous materials, flammable liquids, or gases
- Clearance or final-sale items
If unsure about your item, please contact us for guidance
Rapid Deployment
Ready to deploy in minutes.
Self Supporting
Self‑supports as it fills.
Multi‑Liquid Compatible
Stores water, fuel, and chemicals.
Easy Handling
Folds down for easy transport.
Industrial Fabric
Built to handle tough conditions.