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J-Valve reserve plug?

Discussion in 'Vintage Equipment Diving' started by ScubaBunga, Aug 11, 2019.

  1. ScubaBunga

    ScubaBunga Nassau Grouper

    # of Dives: 500 - 999
    Location: wright city, mo
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    i have several j-valves and was wondering (I could not find anything in internet searches) if there was a simple plug that could be used to replace the reserve mechanism and basically turn them into easier to carry k-valves? Something like the plugs when you separate a manifold set. Anyone know?
    Thanks.
     
  2. happy-diver

    happy-diver Skindiver Just feelin it ScubaBoard Sponsor

    # of Dives: 100 - 199
    Location: same ocean as you
    1,133
    670
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    There were blanking plugs installed by dive shops when these valves fell out of favour
     
  3. captain

    captain Captain

    8,983
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    Why? Just leave the lever down.
     
    dead dog likes this.
  4. ScubaBunga

    ScubaBunga Nassau Grouper

    # of Dives: 500 - 999
    Location: wright city, mo
    117
    70
    28
    I could and will if I can’t find plugs, but one less moving part to remember to keep down and to service is always good.
     
  5. AfterDark

    AfterDark Solo Diver

    # of Dives: 1,000 - 2,499
    Location: Rhode Island, USA
    7,970
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    Or you can turn the lever down and wire it in place.
     
    captain likes this.
  6. captain

    captain Captain

    8,983
    7,399
    113
    If you aren't going to use it there is no need to service service it and eventually it will keep itself down.
     
  7. rhwestfall

    rhwestfall Solo Diver

    # of Dives: 200 - 499
    Location: "La Grande Ile"
    12,304
    11,015
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    Or, if modern 3/4x14 thread, buy a $39 DiveRite K-Valve (and send one of us the J-Valve....)
     
  8. ScubaBunga

    ScubaBunga Nassau Grouper

    # of Dives: 500 - 999
    Location: wright city, mo
    117
    70
    28
    My J-valves should all be usable. I have 5 steel 72’s waiting to be hydrod. I may have found a place that will plus stamp them. I’ll be servicing the valves but since I never use the reserve switch on the one valve I often use, I figured if there was a plug, i’d use them but keep the reserve to replace possibly someday. If anyone wants to pay $60+shipping so I can get a new pro valve from my lds, i’d be happy to part with a couple of them. They are standard 3/4”x14 threads and other than being old and in need of a good cleaning, I expect they will be quite usable. The one has an odd burst disk, looks like instead of an external nut head it is just a screw (the threaded part) screwed in with a hole in the middle of the screwdriver slot.
     
  9. JackD342

    JackD342 Dive Shop

    # of Dives: 500 - 999
    Location: Highland Park, IL
    2,130
    1,189
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    If you use those valves, you really need to replace those burst discs. If I remember correctly from my PSI/PCI class, the word “illegal” was used. And that is because they are fairly dangerous if/when they fail due to pressure being released in a single direction. Modern burst discs direct the air in 3 opposing/cancelling directions, imparting minimal motion to the cylinder.

    I would expect a high likelihood that any shop paying attention will not fill a cylinder with such a valve. The hazard is more on them at time of fill than on you.
     
  10. happy-diver

    happy-diver Skindiver Just feelin it ScubaBoard Sponsor

    # of Dives: 100 - 199
    Location: same ocean as you
    1,133
    670
    113
    The slotted threaded plug has the same thread and accepts current hex headed plugs legally
     

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