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Possibly round out procedure wasn't preformed prior to hydro.

Dead reckoning- If you don't reckon right you may end up dead All metal through hull fittings must be electrically bonded together and to a sacrificial zinc anode to prevent electrolytic corrosion of the through hull fitting.

I had a tank sitting outside under a roof for years with out a valve. When I went to put it back in service it looked just like the day I put it there.

Tell them you are search and rescue diver who sometimes is in black water and can't see your SPG and OSHA requires one. 1910.424(c)(4) A diver-carried reserve breathing gas supply shall be provided for each diver consisting of: 1910.424(c)(4)(i) A manual reserve (J valve);

Back when you and I started all tanks were steel and compressor filtration wasn't what it is today

Aluminum doesn't rust so why do tanks built from 6061-T6 aluminum need inspection every year. Corrosion Resistance When exposed to air or water, 6061 aluminum alloy forms a layer of oxide which renders it nonreactive with elements that are corrosive to the underlying metal. The amount of...

Not sure a 3A can be plus rated, never saw any that had.

I also can not remember the name. You could say it was the first attempt at a wing.

The plus rating is good for the same 5 year hydro period and must be renewed every hydro. The hydro facility must have documentation of the cylinders REE (residual elastic expansion ) limit either in the form of being stamped on the cylinder or paper documentation from the manufacturer. There is...

Lake Pontchartrain in Louisiana was also a gunnery range in WW ll. The bottom is mud with a large population of Rangia clams. The clam shells at one time were used as gravel to build roads and parking lots. Suction dredges sucked them up along with .50 caliber bullets and spent casings. As a kid...

Say it ain't so, you mean someone actually caught and killed the fish in the supermarket.

One part of my YMCA course (scuba diver, no other level other than instructor in 1970) involved a game of underwater hockey every pool session with just mask and fins to develop comfort in the water and conditioning. Also gear was tank and regulator, no octo or BC, wasn't yet conceived of yet...

Mostly 80's gear, nothing with much collector or user value. They are worth what ever you can get for them on Ebay.

I only dove with people who knew how to buddy breath, never ever had an octo.

The ones I have have a couple of dive shop hydro stamps with various symbols between the month and year from before the RIN became law. I recall a local dive shop filling them in the 70's. I think when AL 80's came out the Navy EOD just switched to them and rebreathers. There were reports of the...

What's wrong with the original valves that can't be resolved.

I have a set, they were made using 6061 aluminum tube spun closed at both ends. The bottoms have a screwed in plug that is ground flush on the out side. All the test information needed is stamped on them. I had mine hydroed but not stamped and fill them myself. nd fill them myself.amped

I had a set of original USD web harness bands from 40 years ago.

I have a USD solid bar manifold on 72's. Center to center spacing is 8-1/4"

Absolute the best for repair of galvanize or bare steel. I prefer to roll on 3 coats and let cure for at least 2 weeks. ZRC Galvilite