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Single Tank?

Discussion in 'Hogarthian Diving' started by Scubastud16, Dec 6, 2007.

  1. Scubastud16

    Scubastud16 Divemaster Candidate

    # of Dives: 100 - 199
    Location: Nowhere
    1,043
    1
    38
    Hey guys. Didn't know EXACTLY where to post this, but I wanted to get some opinions of other on Hog rigs.

    I'm looking for single tanks to buy for my use. At the moment, I rent AL 80's. Renting them filled with EANx is becoming expensive, so I'd like to own something.

    My rig is as follows:

    DR Aluminum Plate
    Hog harness
    Oxycheq Mach V #30 Signature series

    I looked at Catalina AL 100's a while back, but they're huge (tall, as well as 8'' diameter), and they have an operating pressure of 3300 as opposed to 3000 for an AL 80. I don't think the 8'' diameter will fit in the tank racks of commercial boats.

    If I get AL 80's, they might be able to get doubled up later.

    Steels sounds nice, but WAY too expensive for a college student like myself.

    I want all of my diving to be on Nitrox from now on, if possible.

    Thanks!

    Danny

    Edit: Average SAC rate for a 6'1'' 170 lb male, most of diving is done in springs, reefs, and wrecks. Usually not past 100 feet. I would like to have a little extra air than an 80, but they will do for now if that's what I have to do.
     
  2. TSandM

    TSandM Missed and loved by many. Rest in Peace ScubaBoard Supporter

    36,349
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    I dive steel 95s, which are 8" tanks, and to date, I haven't had a problem fitting them onto dive boats. It might be different where I am, because most people dive steels up here.
     
  3. Mike Edmonston

    Mike Edmonston Tech Instructor

    # of Dives: I'm a Fish!
    Location: Central Florida
    770
    6
    0
    On a regular shallow 2 tank dive 30 to 40ft, I usually bring a single 130 steel. I set it up on the dock, and I don't change tanks on the boat. Gives me more time to help the students with their rigs. I have not had any problems with dive boats as far as tanks fitting in the racks. Diving steels also allows you to ease up on the amount of weight that you need to add.

    YMMV

    Cheers :D
     
  4. Peter_C

    Peter_C Solo Diver

    # of Dives: I just don't log dives
    Location: Santa Rosa, CA
    5,889
    741
    113
    If you do the math I doubt you will see a savings in purchasing your own tanks. The reason to buy your own tanks is to buy steel, so you can take weight off, and always have your tanks filled and ready to go. Keep an eye on Want to Sell - The Deco Stop for some good used tanks. You can buy doubles and split them up. Might even be able to trade out the double manifold and bands + get some money for some single valves. Also check other classifieds.
     
  5. DA Aquamaster

    DA Aquamaster Directional Toast ScubaBoard Supporter

    # of Dives: 2,500 - 4,999
    Location: NC
    11,515
    1,700
    113
    Wanting a little more air than an AL80 (77 cu ft) limits the options to one direction - bigger.

    I am also not a fan of the AL 100 due to it's size, it's weight and it's service pressure. For the same weight and diameter as an AL 80 in a lot shorter tank you can get an X-7-100 or E-7-100 with a service pressure only slightly higher than an AL 100 at 3442 psi. They run in the $350 range new, but show up used for around $270-$300.

    I have recently seen some X-7-80's for sale at around $250 which is not much more than a new AL80 and that may be worth considering.

    Otherwise a new AL 80 (around $200 to $220), or a used AL 80 (around $125-$150) would work for you if you can live with 77 cu ft of gas.

    Doubles often show up at very reasonable prices but you have to jump on them within an hour or two of them being listed if the price is really good.

    If you end up with doubles and want to swap a manifold and/or bands for Thermo 232 bar convertible DIN/K valves, let me know. I have 6 of them sitting around - 2 new ones taken off new tanks and 4 new looking ones taken off tanks only a few months old.
     
  6. PerroneFord

    PerroneFord DIR Practitioner

    # of Dives:
    Location: The Borg Cube
    6,018
    33
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    I regularly see AL80s for around $165 advertised. If you go steel, the LP85 is a GREAT tank. It's similar in size to an AL80, holds more gas, and isn't as expensive as some of the larger steel tanks. Buoyancy characteristics are very favorable as well. They make a nice set of small doubles too.
     
  7. Scubastud16

    Scubastud16 Divemaster Candidate

    # of Dives: 100 - 199
    Location: Nowhere
    1,043
    1
    38
    Are LP Steels favorable for singles diving? I could see how splitting up 95's would be pretty easy.

    Most of the shops around here fill partial pressure (Orlando), and I've been told to watch out with HP tanks, because some shops have problems filling to that pressure with pure oxygen. Thoughts?

    Thanks guys!

    Danny
     
  8. PerroneFord

    PerroneFord DIR Practitioner

    # of Dives:
    Location: The Borg Cube
    6,018
    33
    0
    I much prefer LP steels for singles or doubles. But any shop should be able to fill to the 2640psi of a LP steel, and many will fill to 3000psi so you get a nice boost. That LP85 becomes a 95 in the space of an AL80.
     
  9. OneBrightGator

    OneBrightGator Instructor, Scuba

    # of Dives:
    Location: St. Augustine, FL
    1,834
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    Whatever you go with, buy something you can use down the road. AL80s are the ubiquitous tank in FL and can be found at a bargain. AL80s can be doubled or stages down the road, steel 85s, 95s and 104s (or their sister HP versions) can be doubled up. For someone in your position, AL80s get my recommendation.
     
  10. Splitlip

    Splitlip Great White

    # of Dives: 500 - 999
    Location: Jupiter
    3,913
    467
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    Diver's Direct was running 100cf steel HP 3442 PSI for $250.00. Don't know iif it is still being offered.

    They are very similar in in dimension to the LP 85's. Even a very short fill get's you more boittom time than an al 80. They are similar in weight to the Aluminum 80's with better buoyancy stats.
     

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