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Aqualung regulator

Discussion in 'Vintage Equipment Diving' started by rvojr, Mar 7, 2020.

  1. rvojr

    rvojr ScubaBoard Supporter ScubaBoard Supporter

    # of Dives: 25 - 49
    Location: Williamstown, NJ
    I recently purchased a lot of equipment which had this regulator. Any idea of the roughly the year, model or anything about it? It states aqualung with some numbers on the back: 75 30518 Can I get it rebuilt or would it be a do it myself kind of job?

    Attached Files:

  2. rvojr

    rvojr ScubaBoard Supporter ScubaBoard Supporter

    # of Dives: 25 - 49
    Location: Williamstown, NJ
  3. GJC

    GJC Solo Diver

    # of Dives: 100 - 199
    Location: Southern California, USA
    For more than you would ever want to know about Aquarius regulators

    Anyone feel like giving a history lesson on the Aquarius by USD/Aqualung?

    Yours is from 1975. The 75 from the serial number was the year it was made.

    If you're really attached to it, you can get service kits for it from vintagedoublehose.com

    It will probably be hard to find someone willing to service it for you.
  4. Primary

    Primary Angel Fish

    Any AL dealer should be able to service this reg.
  5. Umuntu

    Umuntu Divemaster

    # of Dives: I just don't log dives
    Location: Traveller
    A very easy regulator to service, with just 3 internal o-rings.

    It's basically an unbalanced piston first stage like the current Aqualung Calypso or Scubapro MK2, with one big advantage:- Instead of adjusting IP using internal plastic shims which require disassembly to add or remove, you adjust IP by screwing the endcap in or out like on a balanced diaphragm. Very simple and a much better design approach.

    You can find the schematic here:
    US Divers Aquarius

    The second stage is a standard conshelf second.

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