Which of the following is NOT a requirement for marine fuel tank installations according to ABYC?

In marine fuel tank installations, one of the critical considerations outlined by the ABYC standards is that fuel tanks must be properly vented to prevent pressure build-up and allow for safe operation. Additionally, securing the tank in place is crucial to avoid movement that could lead to leaks or failures in a marine environment. Having a fuel gauge is also important as it provides the operator with information about the fuel level and helps to manage fuel consumption effectively.

While including a fuel filter is highly recommended for maintaining fuel cleanliness and preventing contamination, it is not explicitly listed as a requirement under the ABYC standards for fuel tank installations. This distinction is significant, as it highlights that while filters play an essential role in overall fuel system maintenance, they are not mandated specifically in the context of tank installation. Thus, the answer regarding the requirement that is not mandated for fuel tank installations is that a fuel filter must be included, as it is more of a functional consideration rather than a regulatory requirement.