SCUBA Cylinder Safety Alert

Florida Down Under, Inc., will not fill any of the following "suspect" cylinders until they have undergone an electronic thread check. We will provide this check FREE OF CHARGE for any cylinder in current visual inspection. This has become a STANDARD part of the FDU visual cylinder inspection process.

Here is "The List" of scuba tanks that the DOT says are most likely made from the 6351-T6 aluminum alloy:

All DOT-3AL tanks manufactured under one of the following exemptions or special permits: 6498, 7042, 8107, 8364, 8422

All composite cylinders manufactured under one of the following exemptions: 7235, 8023, 8115

All Walter Kidde DOT-3AL scuba tanks.

All Cliff Impact DOT-3AL scuba tanks made before July 1990.

All Luxfer 80.8 cu. ft. scuba tanks (S80.8) made before May 1987.

All Luxfer scuba tanks made before August 1987.

All other scuba tanks made in the US before February 1990 (except Catalina).

All scuba tanks not made in the US.

Unless proven otherwise, all scuba tanks in the above list should be assumed as being made using the 6351-T6 alloy.

Also, it should be noted that Catalina cylinders were NEVER made from the 6351-T6 alloy. They were made using alloy 6061-T6, which as of yet, has not been known to fail explosively. All of the manufacturers in the above list, except Walter Kidde, switched to the 6061-T6 alloy on the dates shown.