Pre-Order Fleximake Rainwater Bladder Tank (RWP)
Pre-Order Fleximake Rainwater Bladder Tank (RWP)
Australian Made
10 Years Warranty
- AS/NZS 4020:2018 Drinking Certified
In stock
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Product Details
Product Details
Under Deck & Tight Space Flexible Water Storage
Australian-made rainwater bladder tanks
Do you want to harvest rainwater but don't have room for a bulky rigid tank? The Fleximake Rainwater Bladder Tank – proudly designed and manufactured in Australia – is the answer.
Engineered for under decks, under houses, garages, sheds, and narrow passages, these flexible pillow tanks turn dead space into valuable water storage.
Made from heavy-duty reinforced PVC, they are puncture-resistant, UV-stable, and built specifically for the harsh Australian climate – from blistering summers to torrential downpours.
Available Online Standard Sizes (Pre-Order)
| Model No. | Width (m) | Length (m) | Max Fill Ht (m) | Capacity (L) |
|---|---|---|---|---|
| RWP-010-030 | 1.0 | 3.0 | 0.45 | 800 L |
| RWP-010-040 | 1.0 | 4.0 | 0.45 | 1,100 L |
| RWP-010-050 | 1.0 | 5.0 | 0.45 | 1,400 L |
| RWP-010-060 | 1.0 | 6.0 | 0.45 | 1,650 L |
Material Options – Choose the right grade for your needs
- • Potable Grade – AS/NZS 4020:2018 Drinking Water Certified Approved. Safe for drinking, cooking, off-grid homes, and emergency supply.
- • Non-Potable Grade – Suitable for garden irrigation, livestock, washing cars, and general outdoor use.
Fill Configuration – Bottom, Side, or Top Fill
| Fill Type | Best For | Installation Detail |
|---|---|---|
| Bottom Fill | Permanent or concealed (e.g., under-house) | Hidden pipework. Professional installation recommended. |
| Side Fill | Retrofit with plumber support | Reducer socket (90/100mm to 50mm). May require council/plumbing approval. |
| Top Fill | DIY with direct downpipe access | Direct downpipe connection. No complex plumbing required. |
Fitting Options – Outlet (25mm/32mm) & Inlet (90mm/100mm)
| Outlet Size | Best For |
|---|---|
| 25mm BSP | Standard garden hoses, drip irrigation, household pressure pumps |
| 32mm BSP | High-flow irrigation, farm use, gravity-fed systems, fast filling |
Need a different capacity or custom dimensions?
Our standard pre-order sizes go up to 1,650L. However, we manufacture flexible rainwater bladder tanks from 800L up to 40,000L.
Browse our complete range (800L – 40,000L) for more options →
Pre-order Information
Pre-order Information
What's Included
What's Included
Documents
Documents
Download product documentation:
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
Can’t find the size or shape you need?
We build custom water bladders tailored to your exact capacity, dimensions, and fitting requirements. Whether it’s for a 4x4, boat, or industrial setup, our team can design a solution that fits perfectly
🔧 Fill Configuration (Inlet) – Choose how your tank fills
We offer three ways to connect your rainwater bladder tank to your downpipe. Select the option that best fits your installation space and plumbing setup.
Top Fill – Best for DIY. Connect your downpipe directly to the top of the tank. Simple, no plumber typically required.
Bottom Fill – Best for permanent, concealed installations (like under a house). Clean look with hidden pipework. Professional installation recommended.
Side Fill – Best for retrofit or tight access areas. Uses a reducer socket (90mm or 100mm down to 50mm). ⚠️ May require local council or plumbing approval depending on your area.
👉 For full technical details, diagrams, and professional installation advice, [visit our main Rainwater Bladder Tanks page →]
Product & Materials
👉 Need a different capacity? View the complete Fleximake Pillow Tank range here: https://fmestore.com.au/product/pillow-type-rainwater-bladder-tanks/
• Potable Grade – Certified to AS/NZS 4020 standards for drinking water, cooking, and personal use.
• Non-Potable Grade – Suitable for garden irrigation, washing cars, livestock, and general water storage.
Standard Fittings
• Inlet (Fill Size): 90mm or 100mm – compatible with standard roof downpipes for direct rainwater collection.
👉 Need a different fitting size or custom connection? Please contact us – we can customise inlet and outlet fittings to suit your specific project requirements.
• 25mm – Best for standard garden hoses, drip irrigation, and household pressure pumps.
• 32mm – Best for high-flow irrigation, farm use, gravity-fed systems, and fast filling.
💡 Tip: If you're unsure, choose 32mm – you can always reduce down to 25mm with an adapter available at any hardware store.
To request a custom tank, please provide:
• 📏 Dimensions (Length × Width × Height/Depth) of available space
• ⚙️ Fill configuration – Bottom Fill / Side Fill / Top Fill
• 🔩 Fittings required – inlet/outlet sizes and quantities
• 💧 Material type – Potable (drinking water) or Non-Potable
• 📸 Site photos (strongly recommended for accurate design)
👉 Contact us for a custom quote.
Installation Configuration & Fill Options
• Top Fill – Simplest DIY option. Connect directly to a downpipe for easy rainwater harvesting. No plumber typically required.
• Bottom Fill – Best for permanent or concealed installations (e.g., under-house systems). Provides clean plumbing layout with hidden pipework. Professional installation recommended.
• Side Fill – Ideal for retrofit installations or tight access areas where plumbing runs need flexibility. Requires diverter, 50mm hose, and non-return valve. Licensed plumber required in most states.
👉 If you are unsure, Top Fill is the easiest and most common option for residential installations.
⚠️ In most Australian states, modifying downpipes requires a licensed plumber by law.
Installation & Site Requirements
• Top Fill – DIY-friendly. Most homeowners can install this themselves.
• Bottom Fill or Side Fill – Professional installation recommended.
• Folded and rolled for transport
• Carried through narrow access points (doors, side passages, under-house entries)
• Unfolded and positioned on-site before filling
Once filled with water, it expands to its full size.
Important requirements:
• Ensure the folded tank can physically fit through access points
• Confirm there is enough flat space for final placement
• The surface must be clean and free from sharp objects
👉 If access is very limited, we can recommend a custom bladder design to suit your site.
• Surface must be flat and level
• Free from sharp rocks, debris, or protruding objects
• Suitable bases include concrete slabs or compacted soil
• Maximum recommended slope: 250mm over 10 metres (25mm per 1 metre)
• For steeper slopes, a retaining wall or level platform is recommended
• Custom tie-down or webbing systems are available for challenging sites
Usage & Applications
• Under houses (sub-floor rainwater storage)
• Under decks or patios
• Garages and sheds
• Narrow side passages
• Low-clearance or unused spaces
• Off-grid water storage systems
• Rural and farm water storage
• Commercial rainwater collection
• Potable Grade – Drinking, cooking, showering, and all household uses
• Non-Potable Grade – Garden irrigation, washing cars, livestock watering, toilet flushing, and general outdoor use
Pre-Order, Shipping & Approvals
• The flexible rainwater bladder tank (rolled flat)
• Selected inlet and outlet fittings (based on your configuration)
• Repair patch kit
• Installation guide
• Complex plumbing installations
• Certain Side Fill systems (requires diverter and licensed plumber)
• Local council regulations (varies by region in Australia)
⚠️ In most Australian states, modifying downpipes or installing new plumbing requires a licensed plumber by law. We recommend checking with your local authority if unsure.
• 📏 Dimensions (Length × Width × Height/Depth) of available space
• ⚙️ Fill configuration – Bottom Fill / Side Fill / Top Fill
• 🔩 Fittings required – inlet/outlet sizes and quantities
• 💧 Material type – Potable or Non-Potable
• 📸 Site photos (strongly recommended for accurate design)
👉 Contact our team for a custom quote.
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