How much pressure is a steel 72 scuba cylinder typically filled to?

The typical fill pressure for a steel 72 scuba cylinder is around 2,250 psig. This pressure provides a good balance between gas capacity and weight, making it a popular choice among divers. Steel cylinders are favored for their durability and the ability to hold high pressures. Filling a cylinder to this pressure allows divers to have sufficient breathing gas for their underwater activities while ensuring the cylinder remains manageable in terms of weight and buoyancy.

The other options represent pressures that are more common in different types of cylinders or in specific diving applications. For instance, 3,000 psig is more typical of larger cylinders used for certain technical diving or for specific gas blends, while 1,500 psig and 1,800 psig do not align with standard practices for the steel 72. Understanding the standard fill pressures helps divers make informed choices about equipment and safety during their dives.