
400 Litre Window Cleaning Water Tank, Upright, Baffled
Product Overview
The 400 Litre Window Cleaning Water Tank is a robust and practical solution for the storage and transportation of potable water and a wide range of other compatible liquids.
Manufactured from durable MDPE / medium-density polyethylene, this upright tank provides a nominal capacity of 400 litres, equivalent to approximately 88 imperial gallons.
Designed specifically with mobile applications in mind, the tank incorporates an integrated baffling system to help reduce the movement of water during transportation. The baffles are formed by grooves and openings running through the tank, which interrupt the movement of liquid and help reduce water sloshing from side to side.
This makes the tank particularly well suited to professional window cleaners, car valeters and other businesses that need to transport significant quantities of water as part of their daily operations.
The natural version is manufactured from translucent polyethylene, allowing the approximate water level to be viewed through the tank. This provides a convenient way to monitor the remaining water supply without having to open the tank.
The tank is supplied with an 8" lid and 1" BSP outlet, providing convenient access for filling, inspection and cleaning, together with a standard connection point for compatible taps, hoses, pumps and other equipment.
At approximately 26 kg when empty, the tank provides a substantial water capacity while remaining manageable to position before filling.
Key Features
- 400 litre nominal capacity
- Approx. 88 imperial gallons
- Upright rectangular design
- Integrated internal baffling system
- Baffles help reduce water movement during transportation
- Manufactured from MDPE / polyethylene
- Suitable for potable water storage and transportation
- Suitable for a wide range of compatible liquids
- Natural translucent finish allows the water level to be viewed
- Approx. 26 kg empty weight
- Dimensions of approximately 360 × 1250 × 1010 mm
- Standard 1" BSP outlet
- 8" lid
- Approx. 187 mm lid opening
- Suitable for above-ground applications
- Ideal for professional window cleaners
- Suitable for car valeting and mobile vehicle cleaning
- Other colours available
- Tank capacity subject to approximately ±3% manufacturing variation
Upright Design
The 400 Litre Window Cleaning Water Tank has been designed in an upright configuration to provide substantial water storage while maintaining a relatively narrow profile.
With a footprint of approximately 360 × 1250 mm, the tank can be particularly useful in vehicle-based installations where the available space has a long and narrow configuration.
The upright design makes it suitable for applications including:
- Window cleaning
- Car valeting
- Mobile vehicle cleaning
- Commercial cleaning
- Mobile pressure washing
- Portable water supplies
- Vehicle-mounted water systems
- Agricultural applications
- General liquid storage
The tank should be positioned on a suitable, stable and adequately supported surface.
When empty, the tank weighs approximately 26 kg. Once filled, however, it will contain approximately 400 kg of water, in addition to the weight of the tank and any installed equipment.
The supporting surface, vehicle floor or mounting structure must therefore be capable of safely supporting the combined filled weight.
Integrated Baffle System
A key feature of this tank is its integrated baffling system.
The baffles are formed by grooves and openings that pass through the tank. These interrupt the movement of water and help prevent large quantities of liquid from freely moving from one side of the tank to the other.
This is particularly important when transporting water in a vehicle.
When a vehicle accelerates, brakes or changes direction, an unbaffled tank can allow the stored liquid to move significantly. This movement, commonly referred to as sloshing or surge, can affect the stability and handling of the vehicle.
The internal baffles help reduce this movement, making the tank particularly suitable for mobile water transportation.
The baffles reduce water movement but do not eliminate it completely. The tank must therefore still be properly installed, supported and securely restrained before transportation.
Please note that the manufacturer states that the design of the baffles will reduce the overall usable capacity of the tank.
Ideal for Window Cleaning
This tank is specifically marketed as a window cleaning water tank, making it a practical option for professional window cleaners who need to transport a substantial supply of water to different locations.
The 400 litre capacity provides a useful water reserve for mobile cleaning operations, while the baffled design helps reduce liquid movement when the vehicle is travelling between jobs.
Potential applications include:
- Pure water window cleaning systems
- Traditional window cleaning
- Commercial window cleaning
- Car valeting
- Mobile vehicle cleaning
- Mobile pressure washing
- Commercial cleaning
- Other mobile water-based cleaning applications
The tank can also be used for other compatible liquids where its material, fittings and intended installation are suitable.
Applications
The 400 Litre Upright Baffled Water Tank is particularly suitable for:
- Window cleaning
- Pure water window cleaning
- Car valeting
- Mobile vehicle cleaning
- Mobile pressure washing
- Commercial cleaning
- Potable water transportation
- Portable water supplies
- Vehicle-based water systems
- Agricultural applications
- General-purpose liquid storage
Its upright form and internal baffling make it particularly well suited to mobile applications where water needs to be transported regularly.
| Capacity | 400 litres |
|---|---|
| Dimensions (W×L×H) | 360 × 1250 × 1010 mm |
| Empty Weight | 26 kg |
| Material | MDPE |
Important — please read
Please ensure the product you are ordering is the correct size and suitable for the purpose. Special order, bespoke and non-stock tanks are not returnable. If you order a tank and find it is too big, too small, or unsuitable for your requirements, it can be expensive to return. Our cancellation & returns policy explains this in more detail — see Terms & Conditions.
Delivery charges
Our shipping costs cover most of the UK. However, parts of England, the Scottish Highlands and Islands (including areas north of the Glasgow / Edinburgh border), Isle of Wight, Channel Islands, Isle of Man, Anglesey, Western Isles, Shetland Islands, Orkney Islands, Isles of Scilly, Northern Ireland and the Republic of Ireland may cost more.
Please call before ordering if the delivery postcode is listed below. There may be additional shipping costs.
- AB
- BT
- CA
- CT
- DD
- DG
- EH
- FK
- G
- GY
- IM
- IV
- JE
- KA
- KW
- KY
- LD
- LL
- ML
- PA
- PH
- PO 30–41 Isle of Wight
- SA
- SY
- TD
- TN
- TR
- ZE
- Southern Ireland
Looking to avoid shipping charges?
All our tanks are available for collection ex works. Our suppliers are based all over the UK — please call if you wish to collect.
Overseas orders
International orders are welcome. Payment is by IBAN / SWIFT / BIC, MoneyGram and letters of credit. We regret that credit cards are not accepted for international orders.
A purchase order is required; we will then create a pro-forma invoice, and tanks are ordered on clearance of funds.
If you require additional export documentation — for example a Certificate of Origin, or commercial invoices certified by the Chamber of Commerce — you must notify us before completion of your order, as we will have to invoice cost and admin charges to the order.
Please call if you have any questions: +44 (0)1643 703358
Offloading
Unless a HIAB delivery has been booked at additional cost, it is the customer’s responsibility to offload with suitable equipment on the day of delivery. A failed delivery may result in additional charges.
We recommend that installers, plant hire and installation materials — excavators, aggregates and so on — are not booked until you are in receipt of the goods. Tanks Direct cannot be held responsible for costs incurred due to unforeseen delays; please see our terms for more details.
Any questions about your delivery? Contact the Sales Team on 01643 703358.
Thank you for your enquiry to return your order.
Please note, we may not be able to provide a refund for the original carriage costs paid and there may be further charges for restocking and collection to apply before your refund is processed.
Certain items may not be returnable, for example those made to order or for sanitary reasons. Please check the product page for more information.
If goods have been used, installed or are returned in less than 100% as new condition & we agree to take them back, further costs may apply. Please see our terms and conditions or contact us for more information on your specific order.
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Why Tanks-Direct
22 years. 100,000+ tanks. Specialists, not generalists.
Nationwide delivery
GB and Northern Ireland covered. HIAB and crane offload available. Highlands and Islands quoted on request.
WRAS & BS EN compliant
Every potable tank is independently certified. Documentation supplied with each delivery.
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Specialist advice
Trade-grade phone and email support, Mon-Fri 8am-5pm. Site visits for orders over £2,500.





