Bowsers sold from 2004 and onwards should meet the regulations and are compliant with IBC and ADR regulations. If your tank is old or you aren’t sure whether it’s an IBC, you’ll need to check it and replace it with a compliant spec.
Bowsers that are compliant should have approval and manufacturer plates, if not, it’s unlikely to be ab IBC. The will also be appropriately marked with UN packaging and codes which can identify the type of IBC.
Any bowser manufactured and sold from 2004 and onwards will be approved and compliant with the IBC regulations.
Your bowser should also be able to hold 110% of its contents. If your bowser is only single skinned, it is no longer allowed to transport fuels on public roads.
If you are able to locate your original documentation for the purchase or certification, it should state upon the paperwork whether it is a bowser or an IBC.
Lastly, IBCs require pressure testing and external inspections every two years and an internal inspection every five years in order to ensure that they are safe for transport on public roads. The records of these tests should be kept and available in the event of a request or inspection from the Department for Transport. If there is no record of the inspections, it is not likely to be compliant with ADR.