Bs 5410-3 -

Bunds must be completely impermeable to water and oil. Prefabricated integrally bunded steel or plastic tanks are standard, though site-built concrete or masonry bunds are acceptable if engineered correctly. Separation Distances and Fire Protection

This guide is for informational purposes only. It does not constitute professional engineering advice. Users must purchase the official British Standards documentation from the British Standards Institution (BSI) for legal compliance and precise technical application. bs 5410-3

Using this standard helps demonstrate compliance with national building and safety regulations. [1.2] Bunds must be completely impermeable to water and oil

: For correct physical installation and ongoing maintenance. bs 5410-3

The standard mandates that all parts of the appliance which can come into contact with flue gases must be gastight under normal operating conditions. Specific requirements include: