350 Litre Window Cleaning Water Tank, Flat
Estimate delivery costs
Your postcode helps us show you accurate delivery costs before you add to basket. We use it only to calculate shipping rates — it is not stored or shared.
350 Litre (75 gallons) Baffled Window Cleaning Water Tank.
Product Overview
The 350 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 / polyethylene, this flat tank provides a nominal capacity of 350 litres, equivalent to approximately 75 imperial gallons. Its low-profile rectangular design makes it particularly suitable for vehicle-based applications where available height is restricted and a larger upright tank would not be practical.
The tank incorporates an integrated baffle system which helps strengthen and support the tank structure when full, while also disrupting the movement of water during transportation. This makes it particularly suitable for mobile applications such as window cleaning, car valeting and vehicle cleaning.
The natural translucent finish allows the approximate water level to be viewed through the tank, providing a convenient way to monitor the remaining water supply.
With an empty weight of approximately 24 kg and dimensions of approximately 750 × 990 × 520 mm, this tank offers a useful balance between storage capacity, compact dimensions and practical handling.
The standard configuration includes a 1" BSP outlet and 6" vented lid, with a range of optional accessories available to adapt the tank to different water storage and delivery systems.
Key Features
- 350 litre nominal capacity
- Approx. 75 imperial gallons
- Low-profile flat rectangular design
- Integrated internal baffle system
- Manufactured from MDPE / polyethylene
- Suitable for potable water storage
- Suitable for a wide range of compatible liquids
- Natural translucent finish
- Approximate water level can be viewed through the tank
- Approx. 24 kg empty weight
- Dimensions of approximately 750 × 990 × 520 mm
- Standard 1" BSP outlet
- 6" vented lid
- Suitable for mobile water storage
- Ideal for window cleaning
- Suitable for car valeting
- Suitable for mobile vehicle cleaning
- Baffles help disrupt water movement during transportation
- Other colours available
- Suitable for above-ground applications
- Capacity subject to approximately ±3% manufacturing variation
Low-Profile Design
The 350 Litre Window Cleaning Water Tank has been designed with a flat, low-profile configuration, making it particularly useful where installation height is limited.
Measuring approximately 750 × 990 mm across the base and 520 mm high, the tank provides 350 litres of nominal water storage while keeping its overall height relatively low.
This makes it especially suitable for vehicle-based applications, trailers and mobile cleaning systems where available vertical space can be restricted.
Typical applications include:
- Window cleaning
- Car valeting
- Mobile vehicle cleaning
- Commercial cleaning
- Mobile water systems
- Potable water storage
- Agricultural applications
- Horticultural applications
- Temporary water storage
- General-purpose liquid storage
The installation area should be checked carefully before ordering to ensure that the tank dimensions and available access are suitable.
Integrated Baffle System
The tank incorporates an internal baffle structure which serves two important purposes.
Firstly, the baffles help strengthen and support the tank structure when it is full of water.
Secondly, the internal structure disrupts the movement of water when the tank is being transported.
This makes the tank particularly useful for mobile cleaning applications where the tank may contain a substantial quantity of water while a vehicle is in motion.
Typical applications include:
- Window cleaning
- Car valeting
- Vehicle cleaning
- Mobile pressure washing
- Commercial cleaning
- Vehicle-based water systems
The baffles help reduce and disrupt water movement but do not eliminate liquid movement completely.
A tank containing 350 litres of water can represent a substantial moving load, so the tank must be correctly installed and securely restrained before transportation.
The baffle design also reduces the usable capacity of the tank.
Ideal for Window Cleaning
The 350 litre capacity makes this tank particularly well suited to professional window cleaning systems.
The flat configuration allows the tank to be installed where a taller tank may not fit, while the baffled construction helps make it suitable for transporting water as part of a mobile cleaning setup.
The natural translucent construction also allows the operator to monitor the approximate water level, helping to determine when the tank needs to be refilled.
The combination of capacity, low profile and baffled construction makes it suitable for both independent window cleaners and commercial cleaning businesses.
Applications
The 350 Litre Flat Baffled Water Tank is particularly suitable for mobile and vehicle-based water storage.
Typical applications include:
- Window cleaning
- Car valeting
- Mobile vehicle cleaning
- Mobile pressure washing
- Commercial cleaning
- Potable water storage
- Agricultural water storage
- Horticultural applications
- Irrigation systems
- Vehicle-based water systems
- Temporary water storage
- General-purpose liquid storage
The low-profile design makes the tank particularly useful where height is restricted, while the baffles make it suitable for transporting liquids when correctly secured.
| Dimensions (W×L×H) | 750 × 990 × 520 mm |
|---|---|
| Empty Weight | 24 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.
Talk to a
specialist
Sizing, regulations, installation. Our team has been answering these questions for over 25 years.
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.
Best-price guarantee
4.6/5 on Feefo from 1272 verified reviews. We price-match any genuine like-for-like quote.
Specialist advice
Trade-grade phone and email support, Mon-Fri 8am-5pm. Site visits for orders over £2,500.
