Its at 5 yrs now like the steels. 465 1994 Views. How Much Does A Scuba Tank Inspection Cost Katy Jane Dives On an annual basis you need to have a visual inspection or VIP completed on your cylinder. . A certified tech will release the air remove the valve and carefully inspect the inside and outside of the tank for corrosion and cracks. They required a 1 or 2 cant remember year interval. Once the first annual inspection has been made youre required to get hydrostatic testing every five years. How often do my tanks need to be tested. Cylinders require a visual test 25 years from date of manufacture stamped on cylinder. Tested cylinders are stamped with the appropriate date. How Often Does a Tank Need to be Inspected. Scuba Tanks must be Tested and Inspected every 5 years before pressurized cylinders or tanks can be refilled. In this way how often do acetylene tanks need to be tested. This ...