How often must scuba cylinders in the USA be visually/hydrostatically tested by qualified professionals?

Scuba cylinders in the USA are required to undergo visual inspections every year and hydrostatic testing every five years. This standard is crucial for ensuring the safety and integrity of the dive equipment. Visual inspections are conducted to check for any signs of wear, corrosion, or damage that could compromise the cylinder's performance under pressure. Hydrostatic testing, on the other hand, involves filling the cylinder with a liquid and pressurizing it to test for leaks and structural strength, thereby ensuring that the cylinder can safely handle the pressures encountered during dives.

This combination of annual visual inspections and five-year hydrostatic tests helps maintain high safety standards for divers, ensuring that their equipment is reliable and in good condition for underwater activities.