What is the minimum fuel pressure when fueling with new foam in the wings?

When fueling with new foam in the wings, maintaining the correct fuel pressure is crucial for safety and operational efficiency. The minimum fuel pressure specified, in this case, is 25 psi. This level of pressure ensures that the fuel flow is sufficient to properly fill the foam in the fuel tanks, allowing for an effective delivery and minimizing the risk of fuel foaming or vapor lock, which can lead to inconsistent fuel supply and potential engine issues. Adequate pressure also helps to prevent contamination and ensures that the fuel reaches all necessary components without significant delays or disruptions. Using a pressure lower than this minimum could result in inadequate fueling, which can compromise the aircraft's fuel system integrity and performance.