Value of PST 120

[Capt.Gene]

The important part of passing the Hydro with this tank is that the Hydro Facility is willing to use PST's recomendations for pre-pressurizing the tank before conducting the hydro.
If they are unwilling to follow the printed procedures put out by PST, not the DOT, the tank may well fail the first hydro test and there are no 2nd tests given.

 

[Rick Christ]

Definitely a great price if it passes hydro. I used to dive exclusively with these tanks and loved the ability to get 2-3 dives out of a single tank. However, my oldest one failed hydro due to overexpansion (believed to be due to hot fills from a local topside station) and my second one failed visual 14 months after its second hydro (most likely due to wet fills on California dive boats). Your mileage in Illinois may vary substantially. I now dive with neutral buoyancy Al 80s.

Both over filling and water/rust in PST E9791 tanks are a problem maker, but these PST E9791 are failing hydro because of the galvanizing alot, Worthington are also. This poor galvanizing is what put PST out of business. The PST 120's are failing more often then the 85's. New PST made in 2005 first hydro are failing. Time will tell how Worthington comes out of the mess they are in right now.

PST and Worthington have a pretest process, Asashi galvanize tanks do not have any pretest process. What does that say?

Stay away from Worthington SP14157 and their galvanize 3AA