Many caravan and RV projects require a custom water tank due to limited space, unusual layouts or specific installation requirements. This guide explains the difference between standard and custom tanks, how the ordering process works, and what information is required before production.
Standard Tank or Custom Tank?
In many cases however, a standard tank may already suit your project and reduce overall cost. However, some caravan and RV builds require a completely custom solution.
Standard Tanks
• Lower cost
• Faster and simpler ordering process
• Predefined sizes and capacities
• Suitable for many common caravan layouts
Standard Caravan & RV Water Tanks
Custom Tanks
• Fully customised dimensions
• Suitable for unusual or restricted spaces
• Allows maximum water capacity
• Ideal for wheel arches, angled walls or underbody spaces
Custom Made Caravan & RV Tanks
Why Many Caravan Builds Require Custom Tanks
Every caravan and RV layout is different. Custom tanks are often required to maximise water storage while working around chassis rails, wheel arches and limited installation space.
- Underbody installations
- Wheel arch clearance
- Angled or stepped tank designs
- Grey water systems
- Black water applications
- Maximising water capacity
Features of Our Custom Caravan & RV Tanks
- Made from food grade 10mm polypropylene
- Folded and welded construction
- BPA free and UV stable
- Lightweight and highly impact resistant
- Internal baffles generally spaced at 350–450mm centres
- Pressure tested to 21 KPa
- Fittings can be located almost anywhere on the tank
- Suitable for fresh, grey and black water applications
- 5 year manufacturer’s warranty
- Proudly made in Queensland
How the Custom Tank Ordering Process Works
- Enter your approximate tank dimensions directly on the product page and submit your request through checkout.
- Freight cost will then be confirmed separately based on your delivery location.
- Once you are happy with the total cost, please send a final drawing showing:
- Tank dimensions
- Tank shape
- Inlet, outlet and breather positions
- Fitting sizes
- After all details are confirmed, production begins.
Important:
Production only starts once the final drawing and fitting details have been approved.
What Should Be Included in Your Drawing?
The final drawing should include:
- Overall dimensions
- Tank shape
- Inlet locations
- Outlet locations
- Breather positions
- Fitting sizes
- Mounting restrictions
- Special shapes or cut-outs
Lead Times
Custom tanks are made to order.
Typical lead time is approximately 3–4 weeks. During busy periods, this may be slightly longer.
Important Installation Tips
• Always use pink thread tape on BSP fittings
• Do not rely on O-rings alone for sealing
• Use flexible hose connections instead of rigid plumbing
• Ensure adequate support under the tank
Incorrect installation may cause leaks and void warranty claims.
Can a Standard Tank Still Work?
Many customers initially enquire about a custom tank but later find that a standard size already suits their project.
• Standard tanks are often more cost effective
• Faster process compared to fully custom tanks
• Large range of standard sizes available
• Freight quoted separately after checkout
• Fittings can still be customised to suit the installation
Need Help Choosing a Tank?
If you are unsure whether a standard or custom tank is best for your project, feel free to contact us.
Frequently Asked Questions
Can fittings be placed anywhere on the tank?
Yes, inlet, outlet and breather positions can usually be customised to suit your installation.
Can custom tanks be used for grey water?
Yes, they are suitable for fresh, grey and black water applications.
What drawing is required?
A simple sketch with dimensions and fitting locations is usually sufficient.
Customers should always ensure their caravan or RV plumbing installation complies with applicable Australian regulations and safety requirements. Learn more
