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Metal Impact AL72

Discussion in 'Tanks, Valves and Bands' started by mcg2015, Jan 5, 2019.

  1. mcg2015

    mcg2015 DIR Practitioner

    Hello, I see DGX is now stocking AL72's made by Metal Impact. I'm not familiar with this company and am wondering if anyone has any experience with these and how they compare to Hy-Mark's (seems to be preferred AL72 on here) or Catalina's (I'm not sure if Luxfer makes or ever made of AL72)?

    I'm also wondering why AL72's aren't more popular for deco bottles. It seems to be an optimum size for a 50% bottle by my calculations. For a tech dive that can reasonably be done with just one deco bottle (i.e., about 30 minutes of deco), the average depth from 70 to surface is ~2 ata, SAC rate assumption of .75 cuft/min (I know this is much higher than mine and most people'd SAC for deco, but works for a conservative estimate), ends up requiring about 45 cu ft. Multiple that by 1.5 and you need about 68 cu ft of 50%. But most people I see on charters here in S. Fl are using 80's (myself included) or 40's (too small unless doing short deco or also carrying O2). Is it just because of availability issues or is there another reason to prefer an 80 over a 72 for the 70 ft bottle?
    Compressor likes this.
  2. Compressor

    Compressor ScubaBoard Supporter Staff Member ScubaBoard Supporter

    # of Dives: 1,000 - 2,499
    Location: NYS
    Competition is good so while I can't answer your question, I'd hope that we get another manufacturer enter the market.
  3. DanaHunt

    DanaHunt DIR Practitioner

    # of Dives: I just don't log dives
    Location: Watertown, NY
    Metal impact has been around for a few years. They were originally sold in xs scuba. I have two of their 50cf tanks. Nothing wrong with them. Xs scuba doesnt advertise them last I checked. Kinda diminishes my theory that MI was made by xs's Worthington acquisition.
  4. JackD342

    JackD342 Dive Shop

    # of Dives: 500 - 999
    Location: Highland Park, IL
    DanaHunt likes this.
  5. runsongas

    runsongas Great White

    # of Dives: 500 - 999
    Location: California - Bay Area
    why carry an al72 when you can cavefill a lp50?
  6. rjack321

    rjack321 Captain

    # of Dives: 1,000 - 2,499
    Location: Port Orchard, WA
    because steel tanks make sucky stage bottles
    RyanT likes this.
  7. rjack321

    rjack321 Captain

    # of Dives: 1,000 - 2,499
    Location: Port Orchard, WA
    80s are available second hand for cheap around here. I have 9 of them and they were all purchased used, stripped, tumbled, and hydroed for a lot less than new.
    Dark Wolf likes this.
  8. tomfcrist

    tomfcrist NAUI Instructor

    # of Dives: I'm a Fish!
    Location: Virginia, USA

    A Lp50 at 3800 is still only 68 cubes. Cool for bailout, not as cool for anything else.
  9. W W Meixner

    W W Meixner Rebreather Pilot

    # of Dives: 500 - 999
    Location: Ontario Canada

    I bought a Metal Impact 19 last year from DGX...excellent quality...inside/outside/thread cut/info stamping...

    The new long 72's will make a nice light set of doubles if Mark goes ahead and has band sets made up...



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