Transit Custom - (2023 onwards) / VWT7 - (2025 onwards) Underslung Water Tank 31L
Transit Custom - (2023 onwards) / VWT7 - (2025 onwards) Underslung Water Tank 31L is backordered and will ship as soon as it is back in stock.
Care information
Care information
To help you get the most from your purchase:
- Follow the manufacturer's care and maintenance instructions.
- Store products clean and dry when not in use.
- Clean with warm water and a mild detergent unless otherwise stated.
- Avoid prolonged exposure to harsh weather when the product is not in use.
- Regular maintenance will help extend the life of your caravan and camping equipment.
If you have any questions about installation, compatibility or maintenance, our team is happy to help.
Delivery and Shipping
Delivery and Shipping
🚚 Delivery & Shipping
We aim to dispatch all in-stock orders within 1–2 working days. Orders placed before 3pm are usually dispatched the same working day, although this may take up to 48 hours during busy periods.
- Standard UK Delivery: 2–3 working days
- Next Day Delivery: Available on selected products
- Large, oversized or pallet items: May take 2–5 working days
- Tracking information will be provided once your order has been dispatched.
- All deliveries require a signature upon arrival.
Please note that oversized, overweight or hazardous items may incur additional delivery charges, which will be displayed at checkout.
If an item is temporarily out of stock, we'll notify you and dispatch it as soon as it becomes available.
Need delivery outside the UK or have a special delivery request? Contact our customer support team for a personalised shipping quote.
Returns & Warranty
Returns & Warranty
We offer a 30-day returns policy on unused items in their original packaging. If your item develops a fault, we'll work with the manufacturer to resolve it quickly. Please see our Returns Policy for full details.
Need Help?
Need Help?
Not sure if this product is compatible with your caravan, motorhome or awning? Contact our team before ordering and we'll happily check compatibility for you.
Why Buy From Trekka?
Why Buy From Trekka?
🇬🇧 UK Based Business
🚚 Fast UK Delivery
💬 Friendly Expert Support
⭐ Quality Brands You Can Trust
🔒 Secure Online Checkout
Transit Custom - (2023 onwards) / VWT7 - (2025 onwards) Underslung ...
Transit Custom - (2023 onwards) / VWT7 - (2025 onwards) Underslung Water Tank 31L is backordered and will ship as soon as it is back in stock.
⚠️ Please Note: A vehicle-specific fitting kit is required for installation. For the Ford Transit Custom (2023 onwards) and VW Transporter T7 (2025 onwards), you will need the 31L Underslung Tank Fit Kit, available separately on our store.
The Wydale Plastics WP-T31UBK5 is a purpose-designed 31-litre underslung fresh water tank engineered specifically for the latest Ford Transit Custom (V710, 2023 onwards) and Volkswagen Transporter T7 platforms. Mounted beneath the vehicle, it provides valuable water storage capacity without occupying interior living space, making it an ideal solution for campervan conversions, day vans, and leisure vehicle builds.
Manufactured in the UK from WRAS-approved polyethylene, the tank is designed for potable water use and features multiple BSP threaded connections for filling, venting, draining, and water pump installation. The moulded design also includes a dedicated recess for a water level sensor, simplifying integration into modern campervan electrical systems.
Key Features
- 31-litre fresh water capacity
- Designed specifically for:
- Ford Transit Custom V710 (2023 onwards)
- Volkswagen Transporter T7 (2025 onwards)
- Underslung chassis-mounted installation
- WRAS-approved food-grade polyethylene construction
- Space-saving design preserves interior storage
- Integrated level sensor recess
- Multiple BSP threaded ports
- Suitable for potable water systems
- Durable black rotationally moulded construction
- Ideal for campervan and van conversion projects
- UK manufactured by Wydale Plastics
Technical Specifications
| Specification | Value |
|---|---|
| Manufacturer | Wydale Plastics |
| Model | WP-T31UBK5 |
| Capacity | 31 Litres |
| Application | Transit Custom / VW T7 |
| Material | WRAS Approved Polyethylene |
| Colour | Black |
| Weight | Approx. 4.6 kg |
| Wall Thickness | 5 mm |
| Overall Length | Approx. 1195 mm |
| Overall Width | Approx. 265 mm |
| Overall Height | Approx. 125 mm |
| Access Lid | 5" Internal Lid |
| Connections | Multiple ½" BSP Ports |
| Level Sensor Recess | Yes |
| Installation Position | Underslung Offside Chassis Mounting |
Fitting Kit Required
For the following vehicles, a dedicated fitting kit must be purchased separately to complete the installation:
- Ford Transit Custom (2023 onwards) — 31L Underslung Tank Fit Kit
- VW Transporter T7 (2025 onwards) — 31L Underslung Tank Fit Kit
Tank Connections
The tank incorporates:
- ½" BSP inlet/outlet ports
- Dedicated vent connection
- Drain capability
- Recess for level sensor installation
- Large 5-inch inspection/access lid
These features allow straightforward integration with:
- 12V water pumps
- Fill points
- Vent systems
- Water level monitoring systems
- Campervan plumbing installations
Benefits of an Underslung Tank
Maximises Interior Space
By mounting beneath the vehicle, the tank frees up valuable space inside the campervan for storage, furniture, batteries, or electrical equipment.
Lower Centre of Gravity
Positioning water weight underneath the vehicle helps improve weight distribution compared with internal tanks.
Increased Living Area
No need to dedicate cupboard or furniture space to water storage, allowing for more efficient campervan layouts.
Professional Conversion Finish
Purpose-built underslung tanks provide a cleaner and more factory-style installation than portable water containers.
Suitable Vehicles
- Ford Transit Custom V710 (2023+)
- Volkswagen Transporter T7 (2025+)
Ideal Applications
- Campervan conversions
- Ford Transit Custom conversions
- Volkswagen Transporter T7 conversions
- Day vans
- Weekend campers
- Off-grid van builds
- Leisure vehicle fresh water storage systems
- Professional conversion projects
Why Choose the Underslung Tank?
The Wydale Plastics water tank offers a vehicle-specific, professionally engineered fresh water storage solution for the latest Transit Custom and VW T7 platforms. With a 31-litre capacity, WRAS-approved construction, integrated sensor provision, and a compact underslung design, it is an excellent choice for campervan builders seeking to maximise interior space while maintaining a reliable onboard water supply.
Payment & Security
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