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Ensuring Tank Safety

In order to make sure that your heating oil tank is safe, please make sure that the following guidelines have been followed:


Tanks that are fixed in place should be manufactured to British Standard 5140, or to:

  • OFTEC standard OST T100, if your container is plastic
  • OFTEC standard OFS T200 or British Standard 799-5, if your container is metal

Ask the manufacturer, or look at the manual that came with your container, to ensure that meets one of these standards.


Your container must have a bund, which is an internal or external case that prevents leaks or spills. External bunds may be made from masonry or concrete and must be impermeable to both oil and water. They must also surround every part of the container including valves and gauges, and must not have any drainage points. Integrally Bunded tanks must meet the following standards:

  • OFS T100 for plastic tanks
  •  OFS T200 for metal tanks

LABELLING: Your container must be clearly and prominently labelled to state that it contains fuel oil, together with advice about what to do in the event of a spillage. It should also carry the Environment Agency Incident Hotline Number, which is 0800 80 70 60.


Your container must be located somewhere that minimises the risk of impact damaged occurring. For example, it should not be situated close to driveways, tanker turning circles or designated fork lift truck routes.

  • Every week, inspect your tank and pipework. Look out for any rust, damage, cracks (IN plastic tanks) and any signs of leaks.
  • Never leave a tank sight gauge valve open. Sight gauge valves that do not close automatically should not be used. The valve should only be opened when tank oil level is being.
  • Once a year, have an OFTEC technician service and inspect your boiler, tank and pipework.
  • Be alert to possible leaks by noting your oil use. A small leak, over time, can add up to a large loss of oil.
  • If you notice a leak, ask your OFTEC technician to investigate and carry out any repairs.
  • When installing a new tank and/or pipework, always use an OFTEC technician.

Find out more about tank storage and safety at: