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I have one of those old tanks too. Mine has "USN" stamped on the neck, along
with an original hydro date of 1944. I beleive that they were CO2 bottles,
adapted to scuba use.
The bushing that converts the original thread to the old-style pipe thread scuba
valve presents a problem when filling the tank commercially. The CGA does not
approve of bushings, so most scuba shops won't fill it. My tank is in A-1
condition inside, and always passed hydro, so I fill it (myself). (BTW, I just
use it in the shop; never had a need to use it as a scuba tank).
Be aware that many of these old tanks were not gavanized on the outside, so
watch for corrosion under the paint.
Andy Cohen
______________________________ Reply Separator _________________________________
I just picked up to old steel tanks and am trying to find out more about them.
They were assembled as doubles with a Dacor single center post manifold
and old dacor backplate/harness.
They are about the size of steel 72's perhaps smaller.
The first hydro is Aug of 1958, second and only other is July of 1973.
The working pressure is 1800 PSi (stamped: ICC-3AA1800)
Serial numbers: 8023CC and 7993CC
The manufacturer stamp looks like the outline of an interstate highway
sign, with the letter H stamped inside and the letters WK to the right.
the valve opening has what looks like an adapter to fit the dacor 1/2"
manifold. without the adapter the neck looks more like a regular neck
on a steel 104. (I cant tell what size as of yet, I cant get the
valves out...)
The only other peculiarity is the bottom, it is not round, but more like
the bottom of a plastic soda bottle, with the little "lump legs?"
e.g. look at the bottom of a Pepsi one liter plastic bottle and add one
more lump. (six total).
Can anyone figure out who made these tanks, and if so, exactly what size
they are? any safety records (problems)?
Thanks. If they pass hydro, they're gonna be short deco O2 bottles.
Jason Richards
NSS/CDS 41539
rchrds@ho*.co*.ed*
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