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Tank Saver?!?! Is thing for real?

Discussion in 'Tanks, Valves and Bands' started by luckydays, Aug 24, 2009.

  1. luckydays

    luckydays Solo Diver

    # of Dives: 200 - 499
    Location: San Pedro CA
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    I was randomly searching ebay for a scuba tank and I came across this "Tank Saver". I understand that the O Ring can fail but I don't see how this "Tank Saver" can fix the tank to save it from being tossed. Plus I can't imagine a tank being thrown away just because it leaks at the O Ring. Replace the O Ring and you are back in action. At least that is what I thought. This seller has sold a few of these with positive reviews. This one is up with an initial bid of $20.

    I do not have AL tanks and the auction only discusses AL tanks so I guess I would not need it but I am curious is this would be useful at all and how would it be useful. Also, I am wondering if anyone here has this sort of device. I am not the seller trying to find another way to sell this device nor am I in any way affiliated with the seller. I am just curious if someone is a swindler and found a way to sell pet rocks to scuba tank owners or if this is a useful tool to have.

     
  2. oxyhacker

    oxyhacker Loggerhead Turtle

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    The O-ring seating surface on an aluminum tank can corrode or get damaged so that the O-ring can no longer make a reliable seal. Tools similar to this, that reamed the seating surface to get a fresh surfuce used to be sold, but they were illegal under DOT regs because they removed metal from the tank neck, which could potentially weaken it. Also, by removing metal from the tapered seating area they made the O-ring fit sloppier, which could actually increase the chance of leakage. Recently several sources have revived the idea, but modified the design so the tool in theory burnishes the surface - that is to say, smoothes and polishes it - rather than scraping it, so it doesn't remove any metal, and should be legal to use. This appears to be one such tool though from the description it is hard to say for sure.

    It's a specialized piece of equipment to deal with a fairly uncommon problem, so while it might be useful, assuming it works as promised, in a shop, it isn't really something the average diver needs in his or her dive bag.
     
  3. Chugwhump

    Chugwhump Loggerhead Turtle

    # of Dives:
    Location: SE Florida, the flattest part, I can see Mount Pom
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    BAH!
    Aluminum Scuba Tanks.

    (I actually have 3, they rot in the garage, (2) 90's and an 80, lol)

    Chug
     
  4. fppf

    fppf Manta Ray

    # of Dives: 200 - 499
    Location: Buffalo NY
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    Those are pointless
    The sealing surface for the oring is between the bottom edge of the valve and the ID of the tank neck. Not the top of the tank neck, the surface those "polish".
     
  5. oxyhacker

    oxyhacker Loggerhead Turtle

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    I take it back. I found a better picture, and there's a cutting tool insert on it, set up for shaving the top of the neck , not the seating taper (unless maybe it can be reset for that) as earlier tools did. The idea apparently being to tighten up the O-ring fit by reducing the depth of the recess where the O-ring goes.

    Clever and reasonably priced, but since it removes metal it is of very questionable legality. I'd want to see a letter from the DOT or at least a couple tank manufacturers approving the tool before I used one.

     
    Last edited: Aug 24, 2009
  6. captain

    captain Captain

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  7. beanojones

    beanojones Solo Diver

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    The bubbling paint under the valve is a frequent cause of leaks out here in the wilds.

    We just use a file though.
     
  8. mksmith713

    mksmith713 Solo Diver

    # of Dives: I just don't log dives
    Location: Jupiter,Fl
    991
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    chugwhump, why don't you let me take those 3 tanks off your hands.
     
  9. oxyhacker

    oxyhacker Loggerhead Turtle

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    I contacted Luxfer and was told that using a tool like the Tank Saver would be grounds for condemning a tank, since it would constitute an unauthorized modification of the tank - according to DOT regulations only the original manufacturer can modify a tank. Oh, I also asked the person selling the Tank Saver on ebay if it had been run by the DOT or any tank manufacturers, and they replied just don't buy it!

    Interestingly enough, the Luxfer rep said that they have not examined or approved the O-Ringer that PSI sells, either.

     
  10. DCBC

    DCBC Tech Instructor

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    Good answer oxyhacker. The fact that some of the metal is removed is enough to void the hydro. If however a new hydro was undertaken and it passed, I wouldn't see a problem in using it.
     

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