Should I buy these Japanese (Asahi?) 120 tanks?

[PBcatfish]

IF Genesis still sells Ashai tanks, then you can get it off their web site.
http://www.genesisscuba.com/product.php?product_id=201

(not sure if these tanks at the URL are Ashai or not though)

The link does not work anymore. Does anyone have buoyancy data on these tanks?

 

[runsongas]

SHERWOOD HP 120 CU FT STEEL SCUBA DIVING TANK AIR CYLINDER WITH VALVE AND BOOT

Utilizes the spun process. Chromium Molybdenum steel construction, Inlet thread is standard 3/4"-14 UNF-2B, Negatively buoyant throughout the dive, Manufactured to DOT-E12079, Meets Canadian TC3AAM specifications. Exterior Finish: Shot Blast - Zinc spray coating - powder paint. Interior Finish: Shot Blast

TRUE CAPACITY: 123cu ft, DIAMETER: 7.29 inches, LENGTH: 28.9 inches, WEIGHT EMPTY: 41.5lbs, BUOYANCY FULL: -11.8lbs, BUOYANCY WITH 500 PSI: -4.4lbs

what i could find with a quick search. i thought they were more negative actually.

 

[PBcatfish]

Thank you. That's exactly the information that I was looking for.

 

[Bearded Diver]

SHERWOOD HP 120 CU FT STEEL SCUBA DIVING TANK AIR CYLINDER WITH VALVE AND BOOT

Utilizes the spun process. Chromium Molybdenum steel construction, Inlet thread is standard 3/4"-14 UNF-2B, Negatively buoyant throughout the dive, Manufactured to DOT-E12079, Meets Canadian TC3AAM specifications. Exterior Finish: Shot Blast - Zinc spray coating - powder paint. Interior Finish: Shot Blast

TRUE CAPACITY: 123cu ft, DIAMETER: 7.29 inches, LENGTH: 28.9 inches, WEIGHT EMPTY: 41.5lbs, BUOYANCY FULL: -11.8lbs, BUOYANCY WITH 500 PSI: -4.4lbs

what i could find with a quick search. i thought they were more negative actually.

Appreciate the info as well.

 

[PBcatfish]

Appreciate the info as well.

I have 2 of these now. The valves are getting harder to find parts for, but I haven't been left empty handed yet. They use DIN regulators only. The little screw in adapters don't convert them for yoke service. The DIN connections are at a bit of an angle, so there is no way to fit a yoke around them. These are 3500psi rated tanks & I believe that they carry the smaller 7/8" neck threads, but I'm not going to pull one off to measure now because they are both full at the moment. Getting these hydro'd in the future relies on the company who made them renewing the Special Permit every so often. Mine are painted, not zinc coated. Mine have the same DOT-E12079 number stamped into them.

I also have a Faber 120. I like these a little better than the Faber, but not a lot better. All 3 are heavy to lug around & handle above water. All 3 give me great bottom time & good buoyancy characteristics. I don't change weighting when switching from a Jap tank to an Italian tank. Any difference is negligible. The Faber tank has a valve that works with DIN or yoke. It accepts the little screw in adapters.