How many connections does a fuel bladder have?

A fuel bladder typically has three connections, which serve specific functions crucial for its operation. One connection is designated for the fuel inlet, allowing fuel to enter the bladder. The second connection is used for the fuel outlet, enabling the transfer of fuel from the bladder to the engine or other systems where the fuel is required. The third connection serves as a vent, which is essential for maintaining pressure equilibrium within the bladder during fuel transfer. Proper venting prevents vacuum formation, which could impede fuel flow or lead to structural compromise of the bladder. Understanding these connections is vital for effectively managing fuel systems in various applications, particularly in aviation and military operations where fuel bladders are often utilized.