Steel tank ID - 3000psi

[gvnick]

I recently picked up these two tanks. The one on the right is a Norris 72, it has rings around the top of the cylinder. Kinda cool, wondered if that was common.

The main question is about the other tank. It’s a PST 3000psi. It is almost the same dimensions as the 72, just a hair larger diameter, and ten pounds heavier. Is this the 95ish tank? I have heard of an MP72 as well... any help would be great. Thank you

 

[Scared Silly]

Pretty sure it is an MP72. You get a full 72 cu.ft. at 3300 psi.

 

[Bob DBF]

The MP 72 should be about 4 inches shorter than an old steel 72, at 20.75" tall (take off the boot if it has one to measure).

I liked the Faber version MP72 for goat trail hikes on the NorCal coast, because of the weight it took off my belt.


Bob

 

[gvnick]

It is within 1/2 inch in height of the other tank.

 

[runsongas]

see old thread here

3000 psi STEEL PST cylinder?

but yea, 94 to 95cf at 3300 psi with the + rating

 

[gvnick]

Thank you. That clears it up. I dove it last week and came up with more air than my buddy with an AL80 so I assumed it was the bigger capacity.

Now the other tank. Anyone seen a 72 with rings around the top of the cylinder like that? It's cool looking. That tank was born in 73 and has never been hydro'd since.

 

[runsongas]

If the tank was originally coated, that is likely from the previous owner scraping it off using a lathe

 

[AfterDark]

I have 2 of those tanks, they sure do cut down on the lead! They get heavier every year. Been thinking of putting the pair connected with an old "cheater bar" manifold on a small raft with a 30ft LP hose attached to my double hose. I could dive all day in 20FSW.

 

[AfterDark]

If the tank was originally coated, that is likely from the previous owner scraping it off using a lathe

I doubt it, it's a factory galvanized tank. I've got a couple 72's with the same markings. It's just manufacturing marks that may or may not happen depending on the tooling used.

 

[runsongas]

Some of the galvanized tanks were overcoated with vinyl originally