Plastic Bunded Oil Tanks

Plastic Oil Tank For Sale

RPM Fuels and Tanks, the UK’s premier fuel tank supplier, are proud to offer an extensive range of plastic bunded oil tanks for sale at a competitive price point in a wide variety of capacities and designs to suit a number of applications, both domestic and industrial.

Plastic bunded oil tanks, or double skin oil tanks, consist of a plastic, single skin inner tank housed within an outer tank or bund, meaning that if the inner tank is damaged or overfilled, spillage is contained within the tanks bunded area, protecting the surrounding environment.

Bunded oil tanks are mandatory by law at all commercial, industrial and agricultural premises throughout the UK.  It has also become essential to use a bunded oil tank in many domestic properties or residential dwellings.

Whether you’re seeking a plastic bunded heating oil tank for domestic use or a safe tank for the industrial storage of oil, RPM has the right tank for you. Our selection includes a number of horizontal, slim, and slimline tanks available in capacities up to 7500 litres, from trusted fuel tank manufacturers including Harlequin, Carbery, and Titan.

While all RPM tank prices quoted include our standard 2-to-3-day delivery within mainland UK, most tanks can be ordered on a next day or timed delivery basis.

For further advice regarding your oil purchase or bespoke tank, contact one of our knowledgeable advisors on 01473787787, or contact us via email at We’ll be happy to assist you.

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Bunded Oil Tank FAQs

  • What is a bunded oil tank?

    Bunded oil tanks are a commonly used, and highly recommended form of oil storage, offering a higher level of protection against leakage than ‘single skin’ tanks through their ‘second skin’ design. These tanks essentially consist of a tank within a tank – whilst their inner tank acts primarily to hold fuel, their secondary shell allows for the safe collection of any oil released as a result of a leak. The inclusion of a secondary containment tank (seen in all bunded oil tank designs) allows for the containment of any leaks, helping property owners comply with regulation, and avoid environmental damage. In addition to this, the secure design of bunded oil tanks are thought to help prevent fuel theft, and reduce wear and tear through weather and exposure.

    Bunded tanks are a legal requirement at all commercial and industrial premises storing oil in the UK and Channel Islands, but are commonly used domestically.

  • How long do bunded oil tanks last?

    The vast majority of plastic bunded oil tanks come with a 10-year manufacturer’s warranty as standard – as is demonstrated by top brands Harlequin, Titan, Carbery, and Atlantis. It is not uncommon for plastic bunded tanks to outlast this warranty, lasting between 15 to 20 years when correctly installed and maintained. Maintenance procedures for plastic bunded oil tanks can include ensuring the base of the tank is consistently even, that the tank is kept clear of additional weight, conducting regular inspection for cracks or strain, and ensuring an absence of rainwater.

    Those seeking a lifespan past this point may look to invest in a steel bunded oil tank – these are generally designed to withstand more than 20 years of use with light maintenance.

  • Do domestic oil tanks have to be bunded?

    According to UK regulation and law, all oil tanks containing over 2500 litres installed on domestic properties must have a ‘secondary containment’ – i.e., bunding. For tanks with a capacity under 2500 litres, this regulation varies slightly. Generally, a site pollution risk assessment should be completed prior to installation, taking into consideration the proximity of all controlled water sources which may be polluted in the event of a leak – an event which may be more likely if a single-skin oil tank is used.

    Single skin oil tanks may not be installed under any circumstances in sites within 10 meters of controlled water, within 50 metres of a borehole or spring, or over hard ground allowing for run-off to controlled water. In addition to this, single skin oil tanks may not be used to store and supply heating oil for any building besides a single-family dwelling. For further guidance on oil tank installation regulation, the RPM fuels team recommends consulting OFTEC.

  • What is a single skin oil tank?

    Single skin oil tanks are fuel storage vessels consisting of just one layer – whereas the more commonly used bunded oil tanks consist of two in order to prevent spillage and contamination. The design of single skin tanks are generally less secure, meaning UK regulation imposes strict restrictions on where, when, and how they may be installed – for example, they cannot be installed on commercial properties under any circumstances.

    Despite this, there are a number of single skin oil tanks on the market, most often at lower price points than their bunded counterparts. If you’re considering a single skin oil tank, it’s important to ensure your planned installation site complies with all regulations – consulting OFTEC may assist in clarifying this.

  • Where can I put my oil tank?

    Oil tanks must be located at least 1.8 metres from the nearest dwelling under UK regulation – but must be 760mm from the nearest property boundary. In the event of a fire, this distance would help prevent spread to all properties within close proximity, minimising damage. Where this is not possible, planning regulations may stipulate the installation of a firewall, often required to extend 300mm above, and out from the tank.

    It is highly recommended to install tanks above ground (not buried), and outside unless additional planning permission is to be sought. Oil tanks buried underground must not be installed in areas with high levels of groundwater. Tanks installed in buildings must be bunded (or possess some kind of secondary containment system). The vast majority of local planning regulations dictate that indoor tanks must be installed in a fireproof chamber of some sort. 

    Oil tanks should always be installed by a trained, knowledgeable professional.  For further information on tank installation guidelines, the RPM Fuels team highly recommend consulting your local planning authority, and OFTEC guidelines. 

  • Can I lock my oil tank?

    Oil tanks have become an attractive target for thieves in recent years – particularly in less populated areas of the UK. Having fuel stolen from your tank can be a costly, and upsetting experience – however, there are ways in which you can ensure your tank, and the fuel within it, are protected.

    Both steel and bunded oil tanks are thought to be more secure than their single skinned counterparts – simply due to their increased resistance to drilling. The stronger the material your tank is composed of, the more difficult it is for thieves to access the fuel within it.

    Generally, oil tanks installed indoors or underground are targeted less – however, obtaining planning permission for this may be difficult. Where this is not suitable or possible, installing your tank within view can be beneficial.

    The vast majority of oil tanks sold today will allow for the placement of padlocks on the inspection cap – removing a potential point of access for thieves. Those looking to secure additional points of entry may need to purchase specialist locks or bars. Oil tank cages are a robust, and commonly used option, particularly on commercial properties.

    So, in short, yes, with the correct fitting fill point, manhole access, inspection point, or cabinet access, your oil tank can be locked and left secure.

  • How do I protect my oil tank from the sun?

    The best way to ensure your oil tank is protected from UV damage is at the point of purchase – it’s very important to ensure our tank has been manufactured using UV inhibitor materials if UV damage is a concern in your chosen installation location. These materials will reduce the impact of constant light exposure on your tank, and can be especially important in extending the life expectancy of plastic oil tanks. In situations where location is flexible and planning permission allows, the use of a shelter, indoor installation, or buried installation may resolve this issue.

    Purchasing a high-quality plastic oil tank is an investment – those manufactured with longevity in mind will save time and money in the long run. RPM Fuels’ carefully selected range of fuel tanks, ranging from steel to bunded, offer you a long-lasting, waste saving, safe storage solution for your fuel management system.

  • Can oil tanks be repaired?

    Unfortunately, once damaged, oil tanks are most often unrepairable, particularly in the case of cracks and spillage. For this reason, it is important to regularly inspect the condition of your oil tank. If any signs of damage are noted, an OFTEC registered technician should be contacted. The tank can then be fully reviewed from a professional standpoint.

    This technician will be able to advise on whether or not the tank should be replaced, and suggest maintenance procedures where possible.

    If tank lifespan is a primary concern for you, investing in a high-quality model tends to be highly beneficial. The majority of established tank brands and models come with a 10-year warranty (bunded), and can last in excess of 20 years when correctly maintained.

  • How close to a boundary can I place an oil tank?
    Though specific regulations for oil tank installation in relation to property boundaries vary from region to region, a good rule of thumb to follow is if the tank is less than 3500 litres, it should not be placed within 760mm of a combustible boundary e.g. a fence, assuming that there are no outlets or buildings between the tank and the boundary.
    In addition to this, oil tanks cannot be installed closer than 1.8 meters to the property or any extensions of property, including eaves, sheds, and gazebos. These regulations are put in place to help prevent the spread of fire to all properties within proximity of the oil tank.
  • How do I dispose of an oil tank?

    Oil tanks, on both domestic and commercial properties, should generally be disposed of or ‘decommissioned’ by an OFTEC registered technician. This allows for the process to be completed safely, and efficiently.

    During the decommissioning process, engineers use a range of pumps, fuel storage, and additional equipment to dispose of any old or contaminated oil, before removing the tank itself. In the majority of removals, technicians will measure the amount of oil remaining in the tank, and note any contaminated (or waste) oil. This oil will be pumped out into an alternative storage or holding tank, whilst contaminated oil is disposed of. The tank itself will then be cleaned, disconnected, and disposed of. All old pipework should be removed and disposed of.

    Following the complete disposal of an old or damaged oil tank, a new one may be installed if the chosen or old site, and tank, meet all current UK requirements.

  • Can I relocate my oil tank?

    Before moving an oil tank, an assessment of the newly chosen installation site must be conducted in order to establish any safety and environmental risks attached to location, including proximity of controlled water, and fire risk. It is highly recommended that this installation is undertaken by a trained, or OFTEC registered technician, who will be able to provide expert advice relating to both safety and planning. Any relocation planned and carried out by an OFTEC registered technician will be legally compliant.

  • What size of oil tank do I need?

    For domestic properties, generally, a capacity of 500 litres should be allowed per room in the house – however, there can be advantages to purchasing a tank larger than this rule of thumb calculation suggests – primarily surrounding cost. The amount of oil used by a household varies hugely. According to Tuffa, ‘a typical three-bedroom household using kerosene for heating only, and mostly on weekends and evenings, will use around 1,600 litres of oil annually.’

    Both domestic and commercial tanks sold on the UK market generally range in size from between 1000 to 2500 litres – though tanks of up to 10,000 litres can be purchased from specialist suppliers.

  • What are the base requirements for an oil tank?

    According to UK building regulations, oil tanks must be installed on a stable, flat base extending a minimum of 300mm beyond the tank at its widest point. This base is most commonly constructed of concrete or paving slabs between 50 and 100mm thick, all of which must be smooth or closely butted in order to ensure integrity for the lifespan of the tank. The base must be appropriate to the ground it is constructed on.

    Oil tank bases help ensure the integrity of the oil tank itself, and can greatly assist in preventing the spread of fire to surrounding foliage or structures.

    Though base requirements may vary depending on oil tank use or construction material, all bases should fully support the tank, and adhere to both UK regulation and manufacturer’s instruction.

  • Can oil tanks be installed indoors?

    Internal oil storage tanks should always be contained within an enclosed chamber, but never installed in a habitable area. Detailed requirements for the installation of oil storage tanks within habitable buildings and domestic garages can be acquired from OFTEC – but include;

    • Tanks installed indoors must be stored at the lowest level, inside a fire-resistant chamber.
    • All indoor tanks must be fitted with a secondary containment system (e.g. bund)
    • All drains and offshoots in the proximity of the tank must be closed or sealed
    • The tank must be accessible for inspection or refilling at any time
  • What size is my oil tank?

    Knowing the size of your oil tank and its capacity will make ordering fuel a lot easier and may assist in ordering a replacement or new tank if necessary. The majority of oil and fuel tanks of the UK market, regardless of manufacturer, have a product label listing all product details and dimensions, including size, and capacity. This label should be placed at the front or side of the tank on plastic tanks.

    Both domestic and commercial tanks sold on the UK market generally range in capacity from between 1000 to 2500 litres – though tanks of up to 10,000 litres can be purchased from specialist suppliers. RPM Fuels currently offer tanks between 100 and over 6000 litres.

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