How old is your oldest tank?

[daniel f aleman]

Aluminum tanks are designed to go through 100,000 fills and 10,000 Hydro cycles. 150 fills and your only at .15% not even 1% of the original life expectancy. Are you really doing 600 dives per year?

Dave

As a Divemaster/guide I dive 250 times a year, but my tanks easily make 600 rental dives per year; lotta' banging around.

 

[Bob3]

1955 USD tank, always passes hydro with zero permanent deformation, gets the + rating every time.

 

[rmannix]

Oldest steel: 1967 Dacor 72
Oldest aluminum: USD double 50's from 1976, passed hydro and vis eddy tests in August.
All used.
2 Dacor Luxfer 63's I bought new in 1985. Might retire them though. Have 7 of 14 tanks due for hydro in 2006

 

[jamiep3]

Not sure of the exact date, early 60's I believe with a 1/2" J valve.

 

[james croft]

I've got a small steel tank about 9 cubic feet dated 3-53 made by Arpin that was originally called a Snork-Air. It was a primitve spare air type tank with a regulator built into the tank valve. I replaced the valve with a US diver I Valve and now use it as an argon bottle.

 

[Walter]

Not sure of the exact date, early 60's I believe with a 1/2" J valve.

Is the date not clearly marked? Sometimes they are hard to see on steel tanks.

I replaced the valve with a US diver I Valve and now use it as an argon bottle.

The valve I've seen a few people refer ti as an I valve is actually a K valve. There is no I valve.