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Depending on how the tank is rigged, a broken bungie would mostly result in tanks being out of trim, and not any kind of a hazard. That said, the correct answer is:Let me know when you are replacing the tank bungee. After x amount of years? When it breaks? Other indicators?
Marine grade bungie cord is incredibly cheap, and there are lots of pretty colors. I like 3/16 inch (4.76mm) for some extra stretchiness, but I think the standard thickness is 1/4 inch (6.35mm) which might be desirable if diving steel tanks.D. You're tired of the color of your current bungee.
1/4 inch even for steel tanks up to lp95s was just overkill and a pain in the butt for me. Switched all 6 of my different rigs to quality 3/16th from Randy at Piranha and never looked back. My main rig has the same bungee after installing it in 2013 when I got my tech instructor rating.Depending on how the tank is rigged, a broken bungie would mostly result in tanks being out of trim, and not any kind of a hazard. That said, the correct answer is:
Marine grade bungie cord is incredibly cheap, and there are lots of pretty colors. I like 3/16 inch (4.76mm) for some extra stretchiness, but I think the standard thickness is 1/4 inch (6.35mm) which might be desirable if diving steel tanks.
E: You purchase those adjustable bungee hardware pieces.