Double Tank Size

[DeepSeaExplorer]

It depends... I have LP 104s for cave dives and a couple of sets of AL 80s for the ocean. I also have a set of 95s that don't really work well for anything. They're okay for a second cave dive when the shop is too far to go for fills, but that's about it.

 

[Rhone Man]

Interesting that "other" is the most common response (almost equal to all others combined). I wonder what the result would have been if there have been separate options for 72s and Al80s.

 

[vshearer]

Interesting that "other" is the most common response (almost equal to all others combined). I wonder what the result would have been if there have been separate options for 72s and Al80s.

I suppose if you combined the LP85's/HP100's and the LP104/108's/HP130's it would show those as pretty common overall. What I find interesting is the love 'em or hate 'em towards the 95's.

And I am surprised at the number using the 72's. I need to double up the 4 I have now.

 

[memorex77]

I use Faber 12.2L 232bar steel doubles. I think the overseas equivalent is HP100s.

Roughly the same here. I can't relate to "Faber", but dive D-12.

 

[KY_BOB]

And I am surprised at the number using the 72's. I need to double up the 4 I have now.

You should. They aren't much for serious diving but they are great for fun dives that could be done in a large single tank. I have a BC for single tank diving and a BP/W for doubles. If I'm going for a easy dive and don't need a lot of gas, I take the 72's more often than the single. It lets me practice trim, buoyancy, and things like valve drills. I feel that it helps me with my larger tanks without all of the weight.

I dive them in a wetsuit with no lead, so they aren't much heavier than my BC/HP100 and 12# of lead.

 

[Gilldiver]

I wreck dive around the US Northeast and down to NC. After a few years, or decades, you aquire a few sets of tanks, in my case I grab the right tank for the dive.

The right tool for the job

From left to right: Steel 72's, Aluminum 80's, Steel 100's, Steel 120's.

I love my vintage 72's for anything down to about 120'. I, and my LDS, have no problem filling them to 2500/2600, the 80's go in the same range, the 100's for down to 180, and the 120's only for deeper as I respect my back.

 

[fire_diver]

I use both AL80's and HP100's

 

[vjanelle]

HP100s, which're 12L 232 bar IIRC.

 

[Druid]

I use Faber 12.2L 232bar steel doubles. I think the [-]overseas [/-] US equivalent is HP100s.

I like them as they trim out well and I can get two or three dives out of them.

Me too, but mine are Heisers not Fabers. I don't suppose it helps the op though.

I really can't understand the reasoning for the plethora of US cylinder sizes/pressures, backgas cylinders here are invariably steel, and come in 7, 10, 12 or 15ltrs - pick the size that gives you the amount of gas you need.

 

[bamamedic]

I started off with Worthington 85's but they were a bit heavy in the water, and didn't have enough gas for thirds with my bigger cylindered buddies, so I traded them for Faber 95's.

I love them for backmount, but they really sucked as a sidemount cylinder...got way too butt-light at the end of the dive.