Bunded Diesel Tanks

Using premium, quality equipment, our bunded fuel tanks are fitted with an overfill device and are lockable to aid security. The bund ensures that any leaks from the inner part of the bunded plastic fuel tank are captured.


Bunded diesel tanks have two layers – an inner tank and an outer tank (bund) which acts as a secondary containment (a tank within a tank). In the event of a leak from the main tank, the outer layer will contain all the oil which would otherwise risk contaminating the local area.

Integrally bunded fuel tanks are the most popular kind of secondary containment. The alternative involves constructing a bund from masonry or concrete which is inconvenient, costly and makes a time-consuming installation. All of our diesel tanks are integrally bunded.

All of our bunded plastic fuel tanks are fitted with submersible pumping units, consisting of a pump, flowmeter, a delivery hose and automatic shut-off nozzle, filtration and gauge.

Larger capacities also come complete with bund and overfill devices, and a lockable security cabinet containing any relevant equipment. We can produce a bespoke tank on request and our bunded diesel and fuel tank solutions come in capacities of 1,350 litres to 15,000 litres, or up to 100,000 litres with interlinking.

All of these tanks come complete and ready to use; all that is required is a hard, flat concrete base and your final electrical connection.

You can also check out An Expert Guide to Diesel Storage for information, advice and industry insights covering everything from the types of tanks, storage regulations, how to get the best price on fuel and preventing fuel theft.


We recommend buying the maximum capacity tank you can to reduce the chance of running out of fuel, minimise the frequency of tank refills and to enable you to purchase your diesel at the best possible price.

As a guide, we recommend the following capacities for different industries and company sizes:


In England, oil stored in containers with a capacity under 3,501 litres used for domestic applications aren’t required to have a secondary containment unless they are sited in locations where oil spills can reach public water sources. This includes:

  • Where oil spills could run over hard ground and reach coastal waters, inland fresh waters or a drinking water source.
  • Where oil spills could run into an open drain or a loose manhole cover.
  • Where the tank vent pipes cannot be seen when the tank’s being filled, for example, because the delivery tanker is parked too far away.
  • Within 10 metres of coastal waters or inland fresh waters like lakes or streams.
  • Within 50 metres of a drinking water source, for example, wells, boreholes or springs.

While in these circumstances a bund isn’t compulsory, we still recommend bunding all tanks as good environmental practice. Additionally, when you install a single skin tank you face the risk of regulation updates making your tank no longer compliant.


Commercial oil storage regulations must be followed if your business (including marinas and public sector premises) stores oil in a tank with a capacity of 201 litres or higher, or if your domestic premises stores oil in a tank with a capacity over 3,500 litres.

Regulations state that all commercial diesel tanks must be bunded.


Diesel stored for agricultural usage follows slightly different rules in England. Diesel storage containers with a capacity over 1,500 litres must be bunded. Additionally, no part of the oil storage installation – including yard drains, dry ditches and land drains – can be within 10 meters of inland or coastal waters.



Our tanks have a 10 year guarantee on the inner tank and bund, with all parts carrying a 12 month guarantee. We would recommend regular maintenance of your tank via our service maintenance package to extend the tank’s useful life.


Tuffa Tanks are generally built to order. We can arrange delivery to sites across the UK, or tanks can be collected from our factory in Uttoxeter.

Stock tanks available with next day delivery – call us for current stock levels. Current build times are as follows:

Plastic tanksSmall standard tanks (up to 2500 litres): 7-10 days
Large standard tanks (over 2500 litres): 2-3 weeks
Steel tanksSmall standard tanks (up to 2300 litres): 4-6 weeks
Large standard tanks (over 2300 litres): 8-10 weeks


All diesel tanks should meet British Standards and trade association standards. At a minimum, tanks need to comply with BS EN ISO 9001, should be made of a material suitable for the oil stored with sufficient strength to ensure it won’t burst or leak with ordinary use and are expected to last at least 20 years with proper maintenance. Rotationally moulded polyethylene tanks must also meet BS EN 13341 standards and be CE marked to indicate conformity with health, safety and environmental protection standards. Steel tanks must meet BS 799 standards. Your manufacturer, supplier, or installer should advise you on whether a tank meets these standards.


What is a bunded diesel tank?

A bunded diesel tank is a bulk diesel storage container comprising of two ‘tanks’. The inner tank contains the diesel whereas the outer tanks contains any spills or leaks from the inner tank. As a legal requirement the outer tank must be able to hold 110% of the contents of the inner tank.

What is a bunded fuel tank?

Bunded fuel tanks have two layers – an inner tank and an outer tank (bund) which acts as a secondary containment (a tank within a tank with a capacity to hold 110% of the primary tanks contents). The bund will capture any spills or leaks from the inner tank.

How much should a bund hold?

To comply with oil storage regulations a bund should hold a minimum of 110% of the inner tanks contents. We manufacture steel and plastic bunded fuek tanks.

How do you store diesel fuel?

When bulk storing diesel in quantities above 200 litres a bunded diesel tank is often required. The bunded diesel tanks we manufacture are available in plastic and steel and capacities from 1,350 to 86,000 litres as standard.

How do you store diesel long term?

Storing diesel in a tank below 20°C, out of direct sunlight (especially for polyethylene tanks), and free from water will allow you to store diesel for up to a year without the need for additives. Using additives such as metal de-activators, fungicides, biocides and antioxidants can increase this time.

For any enquiries contact our sales team on 01889 567700 or use the online enquiry form on the Contact page.