How should auxiliary tanks be filled?

Filling auxiliary tanks through pump transfer from a supply tank is the best practice for ensuring a safe and efficient fuel transfer. This method allows for controlled and regulated flow of fuel, minimizes the risk of spills, and ensures proper ventilation, which is critical in preventing hazardous situations. Using a pump provides the necessary pressure and flow rate to fill the auxiliary tank without causing excessive agitation of the fuel, which could lead to vapor release or foaming.

The other methods may present various risks or inefficiencies. For example, gravity feeding from overhead tanks can lead to uncontrolled flow and potential spills, while manual filling with a container may not only be time-consuming but also increases the risk of spills and human error. Directly connecting to the main fuel line could pose serious concerns regarding system integrity and safety, as it would require additional precautions to avoid backflow or leaks. Overall, pump transfer is the preferred method for filling auxiliary tanks due to its safety and effectiveness.