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Cave Fills on LP tanks

Discussion in 'Technical Diving' started by ScubaFeenD, Oct 15, 2010.

  1. ucfdiver

    ucfdiver DIR Practitioner

    # of Dives: 500 - 999
    Location: Orlando, FL
    3,338
    501
    Appreciate the offer. I'll get back to you when I have some free time. Right now I have a few diving related obligations and until it floods I don't really have much time to do dives outside of what we have planned :(
     
  2. ScubaFeenD

    ScubaFeenD Marine Scientist

    # of Dives: 200 - 499
    Location: Baltimore, MD
    1,573
    97
    I admit that when i see an Al80 filled to 3500 i cringe, but when i see an lp tank at 3500 im delighted with the extra gas--call it inherent trust in steel over aluminum. Its good to hear how common overfilling is compared to how uncommon tanks bursting is. It gives me confidence in the idea.

    Based on some comments in the thread lp85s are looking mighty nice. Similar to hp100s in dimension and weight but easily carries more gas even at 3000psi. The only problem is diving unbalanced when wet, which i might be for a bit longer.
     
  3. Superlyte27

    Superlyte27 Cave Instructor

    # of Dives: 5,000 - ∞
    Location: Florida
    4,160
    3,318
    I had a burst disk blow a few months ago in the trough while filling and the tank fell over in the water. Freaked me out and flooded the shop.

    I saw the remnants of the tank that blew in Key Largo last and the dent it made into the Diesel Tank for the boats after it removed the victims legs was pretty aweful.
     
  4. LiteHedded

    LiteHedded Contributor

    4,075
    922


    screw the hatters too!
     
  5. kramynot2000

    kramynot2000 Solo Diver

    248
    0
    I had a set of LP95's before and since I had a good relationship with a shop, was able to get good fills when I needed. However, whenever I went out of town the only time I got a good fill was when the shop/boat mistakenly thought they were 3000psi tanks. So, I sold that set and will probably replace them with a set of 119's, which I have a singles now.

    However, I'm now putting together a set of LP72's for shallower dives. I figure that if I need to overfill a bit, I can just top them off using a whip from my 119's. We'll see if it works....
     
  6. LiteHedded

    LiteHedded Contributor

    4,075
    922
    if I had a choice I'd buy the hp equivalent ie: hp130s vs lp104s etc.
     
  7. ucfdiver

    ucfdiver DIR Practitioner

    # of Dives: 500 - 999
    Location: Orlando, FL
    3,338
    501
    The only thing I'll warn you of is that when you start cave diving, at basic cave, you'll be limited by 85's since you can't take a stage and you're diving 1/6ths. The LP85's really only get you further once you drop the stage and start swimming/scootering (but I'm hesitant to scooter with smaller tanks).

    The cave instructor you're thinking of going with has a variety of tanks and I'm sure would be glad to discuss the pro/cons and let you try both.
     
  8. BCSGratefulDiver

    BCSGratefulDiver Mental toss flycoon ScubaBoard Supporter

    # of Dives: 2,500 - 4,999
    Location: On the Fun Side of Trump's Wall
    80,689
    69,695
    Blew a disk on an LP95 once ... the tank break-danced across the room, blowing tiles off the floor and removing everything off the walls. It was quite entertaining ... once I got used to the idea that I'd be spending the night cleaning up the mess ...

    ... Bob (Grateful Diver)
     
  9. ScubaFeenD

    ScubaFeenD Marine Scientist

    # of Dives: 200 - 499
    Location: Baltimore, MD
    1,573
    97
    It's a good point. However, right now its a toss up between Al80s and some sort of lp steel tank. I am seriously considering lp85s now (after researching them based on your comments in your post), because they seem to be almost exactly the same size as al80s while being able to hold more gas even at a low overfill of 3000psi. That, plus a stage, might serve me well for the time being (ie boat dives, shore dives and not necessarily cave dives until the end of next summer).

    Thoughts?
     
  10. rjack321

    rjack321 ScubaBoard Supporter ScubaBoard Supporter

    # of Dives: 1,000 - 2,499
    Location: Port Orchard, Washington State
    11,186
    5,928
    In Maryland? Get hp100s, you'll get better fills more consistently. They are the universal good starter doubles.

    You never know if someone will or won't fill lp85s "properly" (i.e somewhere between 3000 and 3600psi). They are annoyingly small with only 2640 or even (shudder) 2500psi in them.

    I loaned out my lp85s (filled to 3200) and lp95s (also filled to 3200) today. So I dove my wife's al80s, 2 al80 bottom stages, and an al40 O2 bottle which I had on a leash. That's alot of junk in the trunk and its way overcomplicating to the point of dangerous if you're just beginning technical or cave diving.
     

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