Fuel polishing is a process that removes water, sediment, and microbial contamination from fuel, ensuring that it is clean and reliable 1. Fuel polishing systems are designed to clean fuel in storage tanks and can be installed in a variety of ways, depending on the system’s components and the type of fuel being polished 123. The installation process typically involves mounting the equipment enclosure to a stable post or wall, installing an anti-siphon valve if the fuel level is above the equipment enclosure, and installing a supply drop pipe from the upper tank flange to the storage tank bottom 2. The fuel polishing unit uses a mixture of filtration and depolymerisation to pass fuel through a series of increasingly finer filters, removing water, sediment, and microbial contamination and cleaning it back to a filtration level of 1-micron absolute, which is an industry high.