Not including volume...

[ACR]

Not including gas volume, what are the considerations one should make when deciding between an HP100, HP120 or HP130.


Thanks!

 

[pescador775]

Dive profile, air consumption and size of diver. If the diver needs a lot of extra stuff like twin regulators, long hoses, etc, then twin 80's might be useful. That would imply DIN type valves to reduce clutter. I'm sure you can do your own cost comparisons.

 

[mike_s]

also note that some brands have different models of HP tanks. so one HP100 might weigh a lot more than another model.

 

[speedhound]

How much of a weight you want to be carrying around on the surface. What kind of build are you, tall and skinny, weightlifter? As long as you can physically carry the tank, take the one with the most air for best bottom time.

 

[The Kraken]

Weight
Length
Diameter

the K

 

[TSandM]

If you take away gas volume, and you're considering all HP tanks, what's left? Dry weight (what do you want to lug around on land?). Buoyancy empty (How much weight do you carry?). Tank length (How will it trim out on your back?) Tank material (Galvanized versus painted). Cost. I know the K mentioned tank diameter, but I can't really come up with any way in which that impacts me, thinking about the stable of tanks we have.

 

[The Kraken]

Diameter = band consideration if one is looking at doubling up.

Also, many dive boats don't have tank racks configured to accept 8" tanks, especially if they have boots. (I normally solve this issue by carrying some bungie cords with me.)

the K

 

[Mr. Bubble]

I have been diving with HP120's, and they are more than I need. I always have way more air than my dive buddies, and my bottom time always is the longest. However, that starts putting me into unplanned deco territory on several dives. Its nice to have the extra air, but they are big and heavy, and hauling them around on land is a pain. I have recently bought HP100's and have found them to be excellant. Still plenty of air, great bottom times, easier to handle on land.

Dive safe!

 

[spectrum]

Weight and length as it relates to trim. Are you a taller or stouter person?

If they are all new then they will be 3442 PSI and be DIN/yoke capable. If you are looking at any 3500 PSI used cylinders those would be DIN only.

 

[Stu S.]

We were using my buddy's PST 120's in 2005. The height of that cylinder made it difficult to tote, as it would not hang at arm's length when carried. You must bend your elbow walking with it. We could physically carry the tanks, but it was not worth the effort. We did not need that much gas.

Happy ending. The 120's sold on ebay for more that he paid for them. Faber 100's went on sale and I got those. Just right.