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85 Litre Flat Water Tank
Product Overview
The 85 Litre Flat Water Tank is a compact, durable and versatile solution for the storage and transportation of potable water and a wide range of other compatible liquids.
Manufactured from high-quality MDPE / polyethylene, this low-profile tank provides a nominal capacity of 85 litres, equivalent to approximately 19 imperial gallons. Its flat rectangular design makes it particularly useful where available installation height is limited or where a compact water storage solution is required.
The tank is manufactured in a natural translucent medium-density polyethylene, allowing the approximate water level to be viewed through the tank wall. This provides a convenient way to monitor the contents without needing to remove the lid.
With dimensions of approximately 500 × 600 × 310 mm and an empty weight of approximately 7 kg, the tank is relatively lightweight and easy to position before filling. It is suitable for above-ground applications and can be used in a wide variety of domestic, commercial, agricultural and mobile water storage systems.
The standard configuration includes a 3/4" BSP outlet and 5" lid, while optional BSP outlets and alternative outlet positioning are available at additional cost.
Key Features
- 85 litre nominal capacity
- Approx. 19 imperial gallons
- Compact flat rectangular design
- Manufactured from MDPE / polyethylene
- Suitable for potable water storage and transportation
- Suitable for a wide range of other compatible liquids
- Natural translucent finish
- Water level can be viewed through the tank
- Approx. 7 kg empty weight
- Dimensions of approximately 500 × 600 × 310 mm
- Standard 3/4" BSP outlet
- 5" lid
- Optional BSP outlet configurations available
- Optional outlet positioning available
- Optional tap kits available
- Optional hosetail kits available
- Optional float valves available
- Optional outlet plugs available
- Suitable for above-ground applications
- Available in natural and coloured options
- Capacity subject to approximately ±3% manufacturing variation
Compact Flat Design
The 85 Litre Flat Water Tank has been designed to provide useful water storage capacity while maintaining a relatively low overall height.
At approximately 310 mm high, the tank can be particularly useful where vertical space is restricted or where a low-profile tank is preferred. Its 500 × 600 mm footprint provides a practical storage solution without requiring the height of an upright tank.
The flat configuration makes the tank suitable for a variety of applications, including:
- Potable water storage
- Mobile water systems
- Agricultural applications
- Horticultural applications
- Commercial cleaning
- Vehicle-based applications
- Equipment water supplies
- Temporary water storage
- General-purpose liquid storage
The tank should be positioned on a suitable, stable and adequately supported surface.
Once filled, the tank will contain approximately 85 kg of water, in addition to the approximately 7 kg weight of the empty tank.
Applications
The 85 Litre Flat Water Tank is suitable for a wide range of applications, including:
- Potable water storage
- Portable water supplies
- Agricultural applications
- Horticultural applications
- Irrigation systems
- Commercial cleaning
- Vehicle-based water systems
- Mobile equipment
- Temporary water storage
- General-purpose liquid storage
Its compact dimensions and low-profile design make it particularly useful for installations where space is restricted.
| Capacity | 85 litres |
|---|---|
| Dimensions (W×L×H) | 500 × 600 × 310 mm |
| Empty Weight | 7 kg |
| Material | MDPE |
| Application | Potable |
| Category | Above ground |
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.





