In the context of fuel tank installation, what does 'bonding' refer to?

Bonding, in the context of fuel tank installation, specifically refers to the process of connecting the fuel tank to the electrical grounding system. This practice is essential to prevent the buildup of static electricity that could ignite flammable vapors, leading to fire hazards. By ensuring that the tank is properly grounded, any static charges that accumulate can safely dissipate, reducing the risk of ignition.

While the other options address various aspects of fuel tank operations or maintenance, they do not capture the safety focus of bonding. Joining two tanks together relates more to physical connections for capacity or function rather than safety. Sealing the tank addresses leak prevention, which is important but separate from the electrical safety aspect that bonding addresses. Creating a warranty is about product assurance and legal protection, rather than the safety protocols involved in fuel storage. Thus, connecting the tank to the grounding system is the critical safety measure that defines bonding.