100s or 120s

[Jeepman3sk]

I am in the market for some tanks. My buddy has a set of 100s that I am going to dive with this weekend on my shark dive. We are only allowed to being one tank so I figured a 100 would be better then an 80. What you guys think of the 100s vs. the 120s. These tanks are steel just a heads up.

 

[scottpsu]

If I had it to do over again, I would get the 100's only because they are more compact and still allow you to hit your NDL or go deco (if so trained). I have a double 120 setup and love it, but getting the rig on and off tends to be tricky, especially from a boat. The extra length of the 120's is what makes it a bit more difficult, but not unmanageable (I'm 6', BTW). Hope this helps some.

 

[mike_s]

Do you have such poor air consumption that you need the 120?

You'd be surprised how long you can stay down on a HP100 with decent air consumption.

Most of the HP100's are about the same physical size as a AL80. So you won't notice the difference except on your weight belt, which will require less lead once you convert to steel.

 

[Jim Baldwin]

I am in the market for some tanks. My buddy has a set of 100s that I am going to dive with this weekend on my shark dive. We are only allowed to being one tank so I figured a 100 would be better then an 80. What you guys think of the 100s vs. the 120s. These tanks are steel just a heads up.

I built a set of PST HP 120's and I could make two long deco dives 150 to 180 range before I needed more air. I had other gas for deco. The 120's are about 3 inches taller than an AL 80 and with very little effort you can become a master at doing the caveman walk with them.

I'm 6' 175 lbs. and in pretty good shape. I used a fold up dolly to move these rascals around. They were just too big for the majority of my diving. I had some PST HP 100's so I broke the 120's down and put the 100's together. Much easier to use and I still have plenty of gas. They also trim out better.

Diving the 120 as a single tank is fine if you're tall enough. And you will definitely shed some lead.

 

[Jeepman3sk]

It looks like I will be going to the 100s. If they are about the same size as a AL80 that will make me happy. I do not have that poor air consumption that I need the 120s jsut my buddy using on and can usually do two dives on it. So I was looking at it. But with the cold waters of New England I'm not sure I would want to stay down that long with a 120 for one dive. When you guys dive double do you use 100s, 119s, or 120s? I want to start a double set up in the next 6-8 months.

 

[Nudgeroni]

Note: I am a newb.

But, I think you should consider 119s. They have the same length as 100s, and are just a little bigger in girth (that, and they weigh 10 more pounds). I don't know if they are too much of a bear for doubles, but as singles, they provide a lot of air.

 

[Jimmer]

If you feel you need the 120 cubic foot tanks for whatever reason, I would consider the 119's instead. They are the same height, approximately, as a 100 but they are bigger diameter. The 120's can be a little awkward with the extra length. They are about 4.25 inches taller than a 119. I'm about 6 foot 3, and I find the 120's a tad long for my liking. I personally use lp108's which pretty much split the difference between the 119 and the 120's for height, and they trim really nicely on me. If at all possible, I would suggest borrowing different doubles if possible to see what works best for you personally. If you ever find yourself making a trip up here to dive, I'd be happy to let you try my 108's.

 

[crosing]

I have a set of 120's they trim out better for me.

 

[2Cents]

I bought into a doubled HP100, works great for me

 

[fppf]

I have a 120 which I like.
I think you need to be at least 6' tall with a larger frame to be comfortable with it.

My with uses a 100 which works best for her.

It also works out as a buddy team because I have a little higher SAC than her and we tend to finish the dives with the same volume left.