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Single first stage on twinset?

Discussion in 'Technical Diving Specialties' started by Markos Valsamis, Feb 11, 2020.

  1. PfcAJ

    PfcAJ Orca

    # of Dives: 5,000 - ∞
    Location: St Petersburg, Fl
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    Yes, it seals to keep water out and gas in.

    They're also good at preventing the DIN fitting from getting bent if something impacts the valve. All my tanks either have a regulator or a DIN plug in them at all times. Cheap insurance.
     
    kensuf, rjack321 and rhwestfall like this.
  2. tursiops

    tursiops Marine Scientist and Master Instructor ScubaBoard Supporter

    # of Dives: 2,500 - 4,999
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    If he has to rent a tank, why not a reg also?
     
    Markos Valsamis likes this.
  3. broncobowsher

    broncobowsher Solo Diver

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    Find a nasty used junk reg. Put plugs in all the ports. Put it on the unused valve. The local shop you get fills at probably has something in the junk pile they will give/sell cheap.
     
  4. PfcAJ

    PfcAJ Orca

    # of Dives: 5,000 - ∞
    Location: St Petersburg, Fl
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    Laugh as you try to remove it and you cant because you dont have a way to purge it.
     
    Pweintz, Jack Hammer and greeniguana like this.
  5. rjack321

    rjack321 ScubaBoard Supporter ScubaBoard Supporter

    # of Dives: 1,000 - 2,499
    Location: Port Orchard, WA
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    You can just remove a port plug and it'll vent
     
    rhwestfall likes this.
  6. Bowers

    Bowers Public Safety Diver

    # of Dives: 200 - 499
    Location: Ohio
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    In that case it would be fine. Dive within limits of single tank, be conscientious of increased fail points, and the plug mentioned a few posts ago would be a REALLY good idea.
     
    Bob DBF likes this.
  7. broncobowsher

    broncobowsher Solo Diver

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    Correct. Works better than a metal DIN plug. That also works but you will only remove it is to completely drain the tanks. The old regulator with port plugs doesn't require draining the tanks.
     
  8. Bowers

    Bowers Public Safety Diver

    # of Dives: 200 - 499
    Location: Ohio
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    Not picturing what your saying about the din plug...
    My din plugs can be turned with a wrench to release pressure then completely removed without draining the tank.
     
  9. rjack321

    rjack321 ScubaBoard Supporter ScubaBoard Supporter

    # of Dives: 1,000 - 2,499
    Location: Port Orchard, WA
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    Don't do that any more than necessary
    1) it destroys the Oring in the DIN plug pretty fast
    2) it slows grinds up the brass threads in the valve
     
  10. Bowers

    Bowers Public Safety Diver

    # of Dives: 200 - 499
    Location: Ohio
    303
    185
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    Agreed, ideally in the scenario given by the op, that valve would never get charged so the problem wouldn’t exist. Its just nice to know its an easy fix if something did bump the valve open.
     

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