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Hose Length

Discussion in 'Basic Scuba Discussions' started by MargaritaMike, Jul 2, 2019.

  1. MargaritaMike

    MargaritaMike Divemaster ScubaBoard Supporter

    # of Dives: 1,000 - 2,499
    Location: On a non-divable lake in SE Texas
    I know this is probably a stupid question, so if someone wants to flame me remember I'm asking in Basic. :)

    Here goes: I have a BC inflator hose that is extremely long for a new setup that I am building. Having never ordered hoses online before, I would like to know if the length of the hose is Option 1: the complete length including fittings (I think this is the correct way) or Option 2: just the hose ignoring the fittings. The first option makes more sense, but there is almost 3 inches in fittings on a couple of hoses I have. The one I'm replacing is 26" using the first method. I only need an 18 or 19 if you include the fittings.

    Thanks for a simple reply of Option 1 or Option 2.

    Cheers - M²
  2. eelnoraa

    eelnoraa DIR Practitioner

    # of Dives: 100 - 199
    Location: San Francisco Bay Area
    someone can correct me if I am wrong. It is actually the mix of option 1 and 2. On the female hex fitting end is counted. On the male size, the threaded part of the fitting is NOT counted. Think this way, if you are installing the hose between two objects, the distance between these two object is the hose length. But having that said, the different is minimal. Not likely to dictate the hose length decision
    rjack321, Ayisha and rongoodman like this.
  3. Mike1967

    Mike1967 Manta Ray

    # of Dives: 100 - 199
    Location: Victoria, Australia
  4. Graeme Fraser

    Graeme Fraser Tech Instructor

    # of Dives: 1,000 - 2,499
    Location: Narnia
    This is quite a useful guide to all things hoses. The answer you're looking for is at 4.29 on the hose guide video:

    Which Hose Do I Need
  5. rongoodman

    rongoodman ScubaBoard Supporter ScubaBoard Supporter

    # of Dives: 200 - 499
    Location: Albany, NY
    FWIW, I have an 18" hose on my Halcyon Eclipse.
  6. divad

    divad Solo Diver

    Yes, they all vary. I have a new 18" LP inflator hose that is 17.5" from 1st stage to end of quick-release fitting. I also have a 22" hose that is 23.5" by the same reckoning.
    rjack321 likes this.
  7. Brilig

    Brilig Nassau Grouper

    # of Dives: 50 - 99
    Location: Boston
    To fully answer the original question...
    No, this is not a stupid question.
    I've heard places like DGX are very helpful. I bet if you call them they would be able to set you straight.
    When you are trying to streamline your gear correct length matters.
    JUST REMEMBER when ordering an inflator hose don't make it so short you can't pull the dump valve. That nearly happened to me.
    NothingClever likes this.
  8. rjack321

    rjack321 ScubaBoard Supporter ScubaBoard Supporter

    # of Dives: 1,000 - 2,499
    Location: Port Orchard, WA
    Most are sized from the outside end of the furrel to the outside end of the opposite furrel. But not surprisingly it can vary by supplier.
    So from on the 1st stage end the threads and nut are not counted. On the distal end the nut for the 2nd stage is not counted nor the female BC end.
  9. PfcAJ

    PfcAJ Orca

    # of Dives: 5,000 - ∞
    Location: St Petersburg, Fl
    Sealing surface to sealing surface.
  10. rongoodman

    rongoodman ScubaBoard Supporter ScubaBoard Supporter

    # of Dives: 200 - 499
    Location: Albany, NY
    You're assuming he has a pull dump valve, or wants to use it. (Is that why people have those overlong inflator hoses bowing out?)
    Doby45 likes this.

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